NEWS

Monday, 22 IUN 2022

LINEAR DYNAMICS, Miercuri 22.06.2022, ora 10.00, sala A27

Detalii

Monday, 15 OCT 2021

16th International Symposium on Geometric Function Theory and Applications (GFTA 2021), 15-18 October 2021

Detalii

Monday, 10 FEB 2020

Workshop on New Directions in Approximation Theory and Related Topics

Faculty of Sciences in Room A27 Detalii

Publications

2024

  • U. Abel, A.M. Acu, M. Heilmann, I. Rasa, Voronovskaja formula for Aldaz-Kounchev-Render operators: uniform convergence, Volume14, Issue1, Article Number 2, 2024

  • A.M. Acu, J.A. Adell, I. Rasa, Explicit upper bounds for Touchard polynomials and Bell numbers, 172 (1) (2024), 255–263.

  • A.M. Acu, S. De Marchi, I. Rasa, Aldaz-Kounchev-Render operators on simplices, Journal of Mathematical Analysis and Applications, Volume 533, Issue2, Article Number 128072, 2024

  • U. Abel, A.M. Acu, M. Heilmann, I. Rasa, Genuine Bernstein-Durrmeyer type operators preserving 1 and xj , Annals of Functional Analysis, Volume15, Issue1, Article Number 4, 2024

  • A. Belhenniche, A. Bucur, L. Guran, A. N. Branga, Using computational techniques of fixed point theory for studying the stationary infinite horizon problem from the financial field, AIMS Mathematics, ISSN 2473-6988, vol. 9, no. 1, pp 2369-2388, 2024. (Clarivate Analytics - Web of Science Core Collection - Science Citation Index Expanded)

  • A. Bucur, A. N. Branga, Theory and applications of numerical approximation techniques, Cambridge Scholars Publishing, Newcastle upon Tyne, United Kingdom, ISBN (10): 1-5275-9383-5, ISBN (13): 978-1-5275-9383-1, 246 pg, 2024.

  • Bodin, Arnaud; Popescu-Pampu, Patrick; Sorea, Miruna-Ştefana, “Poincaré-Reeb graphs of real algebraic domains”, Revista Matematica Complutense 37 (2024), pp. 473–507, 35 pag., https://link.springer.com/article/10.1007/s13163-023-00469-y

  • Bodin, Arnaud; García Barroso, Evelia Rosa; Popescu-Pampu, Patrick; Sorea, Miruna- Ştefana, “Combinatorial study of morsifications of real univariate singularities”, accepted for publication in Mathematische Nachrichten (2024), 25 pag., https://arxiv.org/abs/2306.04601

  • Aurelian Craciunescu, Laurian Suciu and Elisabeta-Alina Totoi, Mediterranean Journal of Mathematics, 21:2, 2024. DOI10.1007/s00009-024-02601-8

  • Aurelian Craciunescu and Laurian Suciu, Brownian extensions in the context of three-isometries, Journal of Mathematical Analysis and Applications vol. 529, 1, 127591, 2024. https://doi.org/10.1016/j.jmaa.2023.127591

  • S.V. Pașca, A. Seserman, A. Șteopoaie, (2024), Iterates of positive linear operators and linear systems of equations, Dolomites Research Notes on Approximation, 17(2), 52-58.

  • Zhou, M., Secelean, N.A., Saleem, N. et al. Best proximity points for alternative p-contractions. J Inequal Appl 2024, 4 (2024)

  • J. Mathew, S. Mathew, N.A. Secelean, On attractors of type 1 iterated function systems, Journal of Applied Mathematics and Informatics, 2024, vol. 42, no.3, pp. 583-605 https://doi.org/10.14317/jami.2024.583


    • 2023

  • A.M. Acu, J.A. Adell, I. Rasa, Rates of convergence for Jakimovski-Leviatan operators in terms of the Ditzian-Totik modulus, Banach Journal of Mathematical Analysis, Volume 17, Issue 4, Article Number 66, 2023

  • A.M. Acu, M. Heilmann, I. Rasa, A. Seserman, Poisson approximation to the binomial distribution: extensions to the convergence of positive operators, RACSAM, Volume 117, Issue 4, Article Number 162, 2023

  • A.M. Acu, M. Heilmann, I. Rasa, Some results for the inverse of a Bernstein–Schnabl type operator. Anal.Math.Phys. 13, 15 (2023).

  • A.M. Acu, G. Mutlu, B. C，ekim, S. Yazıcı, A new representation and shape-preserving properties of perturbed Bernstein operators, Mathematical Methods in the Applied Sciences, Volume 47, Issue 1, Page 5-14, 2023

  • U. Abel, A.M. Acu, M. Heilmann, I. Rasa, Positive linear operators preserving certain monomials on [0,∞), Dolomites Reserch Notes on Approximation, Volume 16, Issue 3, Page1-9, Special Issue 2, 2023

  • A.M. Acu, I. Rasa, A. Seserman, Positive linear operators and exponential functions, Mathematical Foundations of Computing, Volume 6, Issue 3, Page 313-319, 2023

  • F. Ozsara，c, A.M. Acu, A. Aral, I. Ra，sa, On the Modification of Mellin Convolution Operator and Its Associated Information Potential, Numerical Functional Analysis and Optimization, Volume 44, Issue 11, Page 1194-1208, 2023

  • A.M. Acu, I. Rasa, A Discrete Probability Distribution and Some Applications. Mediterr. J. Math. 20, 34 (2023).

  • A.M. Acu, S. De Marchi, I. Ra，sa, Aldaz–Kounchev–Render Operators and Their Approximation Properties. Results Math 78, 21 (2023).

  • A.M. Acu, M. Heilmann, I. Rasa, Some results for the inverse of a Bernstein–Schnabl type operator. Anal.Math.Phys. 13, 15 (2023)

  • A.M. Acu, I. Rasa, H. Srivastava, Some Functionals and Approximation Operators Associated with a Family of Discrete Probability Distributions, Mathematics 2023, 11(4), 805

  • A.M. Acu, I. Rasa, A. Seserman, Composition and Decomposition of Positive Linear Operators (VIII), Axioms 2023, 12(3), 228

  • A.M. Acu, M. Heilmann, I. Rasa, et al. Convergence of Linking Durrmeyer-Type Modifications of Generalized Baskakov Operators. Bull. Malays. Math. Sci. Soc. 46, 113 (2023)

  • A.M. Acu, I. Rasa, A.E. Steopoaie, Strongly convex squared norms, Dolomites Research Notes on Approximation, Volume 16, 2023, 23-25.

  • A.M. Acu, A. Aral, I. Rasa, New properties of operators preserving exponentials. Rev. Real Acad. Cienc. Exactas Fis. Nat. Ser. A-Mat. 117, 1 (2023).

  • A.Ratiu, I. Maniu, E.-L. Pop, EntreComp Framework: A Bibliometric Review and Research Trends, Sustainability, 15(2), 1285, 2023. https://www.mdpi.com/2071-1050/15/2/1285

  • A.N. Branga, I.M. Olaru, Generalized perturbed contractions with related fixed point results, Carpathian Journal of Mathematics, ISSN 1584-2851, vol. 39, no. 3, pp 633–640, 2023. (Clarivate Analytics - Web of Science Core Collection - Science Citation Index Expanded)

  • A.-M. Stoica, A.N. Branga, I. Popa, An inequality for the intermediate point in Lagrange’s theorem, using quadrature formulas, European Journal of Theoretical and Applied Sciences, ISSN 2786-7447, vol. 1, no. 6, pp 269-274, 2023. (IDB: Zenodo, OpenAIRE, ISSUU, Europub, Scilit, Dimensions, Lens.org, Core)

  • Davies, Isobel; Duarte, Eliana; Portakal, Irem; Sorea, Miruna-Ştefana, “Families of polytopes with rational linear precision in higher dimensions”, Foundations of Computational Mathematics, Volume 23, pages 2151–2202, (2023), 52 pag., https://link.springer.com/article/10.1007/s10208-022-09583-7

  • Coons, Jane I.; Maraj, Aida; Misra, Pratik; Sorea, Miruna-Ştefana, “Symmetrically colored Gaussian graphical models with toric vanishing ideals”, SIAM Journal on Applied Algebra and Geometry 7 (2023), no. 1, pp. 133-158, 26 pag., https://epubs.siam.org/doi/10.1137/21M1466943

  • Haque, Sabina J.; Satriano, Matthew; Sorea, Miruna-Ştefana; Yu, Polly Y., “The Disguised Toric Locus and Affine Equivalence of Reaction Networks”, SIAM Journal on Applied Dynamical Systems 22(2023), no. 2, pp. 1423-1444, 22 pag., https://epubs.siam.org/eprint/WP278QE7RACQJDUIFDXY/full

  • Grosdos, Alexandros; Heaton, Alexander; Kubjas, Kaie; Kuznetsova, Olga; Scholten, Georgy; Sorea, Miruna-Ştefana, “Exact solutions in log-concave maximum likelihood estimation”, Advances in Applied Mathematics 143 (2023), Paper No. 102448, pp. 1-32, 32 pag., https://www.sciencedirect.com/science/article/pii/S0196885822001324

  • Lupas Alina Alb, Acu Mugur, Properties of a subclass of analytic functions defined by Riemann-Liouville fractional integral applied to convolution product of multiplier transformation and Ruscheweyh derivative, Demonstratio Mathematica, Vol. 56, No. 1(2023), WOS 001027037000001. https://www.degruyter.com/document/doi/10.1515/dema-2022-0249/html

  • L. Suciu, Wold Decompositions And Brownian Type Operators, Revue Roumaine De Mathematiques Pures Et Appliquees, 68 3-4, 369-381, 2023.

  • L. Suciu, Brownian Type Extensions for a Class of m-Isometries, Results in Mathematics, 78 4, 1-29, 2023. https://link.springer.com/content/pdf/10.1007/s00025-023-01917-3.pdf

  • I.C. Bușcu, G. Motronea, S.V. Pașca, Modified positive linear operators, iterates and systems of linear equations, Mathematical Foundations of Computing, (2023).

  • A.Totoi,On Classes of Meromorphic Functions Defined by Subordination and Convolution Totoi Elisabeta-Alina (ULBS); Cotirla Luminita-Ioana (Univ. Tehnica Cluj-Napoca), Symmetry-Basel 15 9 2073-8994 ,https://www.webofscience.com/wos/woscc/full-record/WOS:001074008400001 https://www.mdpi.com/2073-8994/15/9/1763 DOI10.3390/sym15091763 WOS:001074008400001 12 2023

  • A.Totoi,Integral Operators Applied to Classes of Convex and Close-to-Convex Meromorphic p-Valent Functions Totoi Elisabeta-Alina (ULBS); Cotirla Luminita-Ioana (Univ. Tehnica Cluj-Napoca), Symmetry-Basel 15 11 2073-8994 https://www.webofscience.com/wos/woscc/full-record/WOS:001119664500001 https://www.mdpi.com/2073-8994/15/11/2079 DOI10.3390/sym15112079 WOS:001119664500001 12 2023


    • 2022

  • A.M. Acu, I. Rasa, AE Steopoaie, Algebraic Systems with Positive Coefficients and Positive Solutions, Mathematics 2022, 10(8), 1327.

  • M. Dhamija, N. Deo, R. Pratap, AM Acu, Generalized Durrmeyer operators based on inverse Polya–Eggenberger distribution. Afr. Mat. 33, 9 (2022).

  • V. Bratian, AM Acu, DM Mihaiu, RA Serban, Geometric Brownian Motion (GBM) of Stock Indexes and Financial Market Uncertainty in the Context of Non-Crisis and Financial Crisis Scenarios, Mathematics 2022, 10(3), 309.

  • A.M. Acu, IC Buscu, I Rasa, Generalized Kantorovich modifications of positive linear operators. Mathematical Foundations of Computing, 2023, 6(1): 54-62.

  • A.M. Acu, A Kajla, Blending type approximation by modified Bernstein operators. Adv. Oper. Theory 7, 9 (2022).

  • A.M. Acu, A Aral, I Rasa, Generalized Bernstein Kantorovich operators: Voronovskaya type results, convergence in variation, Carpathian J. Math. 38(1), (2022), 1 – 12

  • A.M. Acu, M Dancs, M Heilmann, V Pasca, I Rasa, Voronovskaya type results for special sequences of operators. RACSAM 116, 19 (2022).

  • A.M. Acu, Madalina Dancs, Margareta Heilmann, Vlad Pasca and Ioan Rasa, A BERNSTEIN-SCHNABL TYPE OPERATOR: APPLICATIONS TO DIFFERENCE EQUATIONS, Appl. Anal. Discrete Math. 16 (2022), 495–507. https://doiserbia.nb.rs/img/doi/1452-8630/2022/1452-86302200011A.pdf

  • A.M. Acu, Vijay Gupta, Ioan Raşa, Florin Sofonea, Convergence of Special Sequences of Semi-Exponential Operators, Mathematics 2022, 10(16), 2978; https://doi.org/10.3390/math10162978

  • A.M. Acu, Rasa, I. Functional equations related to Appell polynomials and Heun functions. Anal.Math.Phys. 12, 77 (2022). https://doi.org/10.1007/s13324-022-00687-5

  • A.M. Acu, Rasa, I. Nonlinear algebraic systems with positive coefficients and positive solutions. J. Appl. Math. Comput. 69, 19–35 (2023). https://doi.org/10.1007/s12190-022-01732-z

  • A. Ratiu, N. Minculete, On Several Bounds for Types of Angular Distances, Mathematics, 10(18), 3303, 2022. https://www.mdpi.com/2227-7390/10/18/3303

  • A.N. Branga, I.M. Olaru, Generalized contractions and fixed point results in spaces with altering metrics, Mathematics, ISSN 2227-7390, vol. 10, no. 21, art. 4083, pp 1-13, 2022. (Clarivate Analytics - Web of Science Core Collection - Science Citation Index Expanded)

  • A.N. Branga, I.M. Olaru, Some fixed point results in spaces with perturbed metrics, Carpathian Journal of Mathematics, ISSN 1584-2851, vol. 38, no. 3, pp 641–654, 2022. (Clarivate Analytics - Web of Science Core Collection - Science Citation Index Expanded)

  • A.N. Branga, Some conditions for the existence and uniqueness of monotonic and positive solutions for nonlinear systems of ordinary differential equations, Electronic Research Archive, ISSN 2688-1594, vol. 30, no. 6, pp 1999 - 2017, 2022. (Clarivate Analytics - Web of Science Core Collection - Science Citation Index Expanded)

  • A.N. Branga, Fixed point results for F-contractions in cone metric spaces over topological modules and applications to integral equations, Fractal and Fractional, ISSN 2504-3110, vol. 6, no. 1, art. 16, pp 1-14, 2022. (Clarivate Analytics - Web of Science Core Collection - Science Citation Index Expanded)

  • M.-Ş. Sorea, “Permutations encoding the local shape of level curves of real polynomials via generic projections”, Annales de l’Institut Fourier (Grenoble) 72 (2022), no. 4, pp. 1661-1703, 43 pag., https://aif.centre-mersenne.org/articles/10.5802/aif.3479/

  • L. Colmenarejo; J.Diehl; M.-Ş. Sorea, “A quadratic identity in the shuffle algebra and an alternative proof for de Bruijn's formula”, European Journal of Combinatorics 99 (2022), Paper No. 103406, pp.1-20, 20 pag., https://www.sciencedirect.com/science/article/abs/pii/S0195669821000986?via%3Dihub

  • Sorea, Miruna-Ştefana, “Measuring the local non-convexity of real algebraic curves”, Journal of Symbolic Computation 109 (2022), pp. 482-509, 28 pag., https://www.sciencedirect.com/science/article/abs/pii/S0747717120300729?via%3Dihub

  • L. Brustenga i Moncusí,; G. Crăciun; M.-Ş. Sorea, “Disguised toric dynamical systems”, Journal of Pure and Applied Algebra 226 (2022), no. 8, Paper No. 107035, pp. 1-24, 24 pag., https://www.sciencedirect.com/science/article/abs/pii/S0022404922000317

  • Sh. Najafzadeh, M. Acu, Applications of the Bell numbers on univalent functions associated with subordination, Journal of function Spaces, Volume 2022, Article Number 2324774, DOI 10.1155/2022/2324774. https://www.hindawi.com/journals/jfs/2022/2324774/

  • M. Acu, G. Oros, A. M. Rus, Fractional Integral of the Confluent Hypergeometric Functions Related to Fuzzy Differential Subordination Theory, Fractal And Fractional, Volume 6, issue 8, Article number 413, DOI 10.3390/fractalfract6080413, 2022. https://www.mdpi.com/2504-3110/6/8/413

  • Sevtap Sumer Eker, Bilal Seker, Bilal Cekic, Mugur Acu, Sharp Bounds for the Second Henkel Determinant of Logarithmic Coefficients for Strongly Starlike and Strongly Convex Functions, Axioms, Volume 11, issue 8, Article number 369, DOI 10.3390/axioms11080369, 2022. https://www.mdpi.com/2075-1680/11/8/369

  • M. Acu, S. Owa, R. Diaconu, Classes of certain analytic functions defining by subordinations, International Journal of Nonlinear Analysis and Applications, Volume 13, issue 1, Page 1099-1103, DOI 10.22075/ijnaa.2017.10857.1528, 2022. https://ijnaa.semnan.ac.ir/article_5651.html

  • G.Ozlem ; M. Acu ; S. Owa , New classes of certain analytic functions, International Journal of Nonlinear Analysis and Applications, DOI 10.22075/ijnaa.2022.26687.3388, WOS 000898547800008. https://ijnaa.semnan.ac.ir/article_6607.html

  • L.Suciu, Operators with expansive m-isometric liftings, Monatshefte für Mathematik, 2022, 1-23. https://doi.org/10.1007/s00605-021-01648-z.

  • L.Suciu, Operators with Brownian unitary dilations, Carpathian J. Math., vol. 38, 2022, No. 3, 619-630.

  • L.Suciu: Asymptotic properties for compressions of two-isometries, Quaestiones Mathematicae, 2022, 1-26. DOI: 10.2989/16073606.2022.2131651

  • I.C. Bușcu, S.V. Pașca, A. Seserman, On Rathore type operators, General Mathematics Vol.30, No.2(2022), 35-39.

  • E. A. Totoi, L. I. Cotirla, Preserving Classes of Meromorphic Functions through Integral Operators, Symmetry-Basel, Volume 14, no. 8, 2022

  • N.A. Secelean, D. Wardowski, On a Certain Class of IFSs and Their Attractors, Qualitative Theory of Dynamical Systems Volume 21, no. 162, 2022

  • N.A. Secelean, D. Wardowski, M. Zhou, The Sehgal’s Fixed Point Result in the Framework of r-space, Mathematics, Volume 10, no. 3, 2022


    • 2021

  • A.M. Acu, I Rasa, Iterates and Invariant Measures for Markov Operators. Results Math 76, 218 (2021).

  • P.N. Agrawal, Ana Maria Acu and Neha Bhardwaj, Quantitative Voronovskaya type results for a sequence of Stancu type operators, Journal of Mathematical Inequalities, Volume 15, Number 4 (2021), 1519–1532.

  • P.N. Agrawal, Ana Maria Acu, Ruchi Chauhan and Tarul Garg, Approximation of Bogel continuous functions and deferred weighted A-statistical convergence by Bernstein-Kantorovich type operators on a triangle, Journal of Mathematical Inequalities, Volume 15, Number 4 (2021), 1695–1711.

  • A.M. Acu, G. Tachev, Yet Another New Variant of Sz´asz–Mirakyan Operator, Symmetry 2021, 13(11), 2018.

  • V. Bratian, AM Acu, C Oprean-Stan, E Dinga, GM Ionescu, Efficient or Fractal Market Hypothesis? A Stock Indexes Modelling Using Geometric Brownian Motion and Geometric Fractional Brownian Motion, Mathematics 2021, 9(22), 2983.

  • A.M. Acu, I Rasa, R Srivastava, Modified Operators Interpolating at Endpoints, Mathematics 2021, 9(17), 2051.

  • A.M. Acu, G Bascanbaz-Tunca, I Rasa, Voronovskaja-Type Quantitative Results for Differences of Positive Linear Operators, Symmetry 2021, 13(8), 1392.

  • A.M. Acu, G. Bascanbaz-Tunca, I. Rasa, Information potential for some probability density functions, Applied Mathematics and Computation, Article Number: 125578, Volume 38, 2021.

  • F. Dirik, K. Demirci, S. Yildiz, A.M. Acu, The uniform convergence of a double sequence of functions at a point and Korovkin-type approximation theorems, Georgian Mathematical Journal, 28(4), 2021, 567-573.

  • A.M. Acu, I.C. Buscu, I. Rasa, A sequence of Appell polynomials and the associated Jakimovski-Leviatan operators, Analysis and Mathematical Physics,11 (2), Article Number 88, 2021.

  • N. Cetin, A.M. Acu, Approximation by alpha-Bernstein-Schurer- Stancu operators, 15(2), 2021, pp.845-860.

  • A.M. Acu, M. Heilmann, I. Rasa, Eigenstructure and iterates for uniquely ergodic Kantorovich modifications of operators II, Apr 2021 Positivity.

  • A.M. Acu, I. Rasa, On the composition and decomposition of positive linear operators (VII), Applicable Analysis and discrete Mathematics 15(1), 2021, 213-232.

  • A.M. Acu, G. Bascanbaz-Tunca, I Rasa, Bounds for indices of coincidence and entropies, Mathematical Inequalities & Applications, 24 (2), 2021, pp.307-321

  • A.M. Acu, G. Bascanbaz-Tunca, I Rasa, Differences of Positive Linear Operators on Simplices, Journal of Function Spaces, Article Number 5531577, 2021.

  • Pooja Gupta, Ana Maria Acu, P.N. Agrawal, Jakimovski-Leviatan operators of Kantorovich type involving multiple Appell polynomials, Georgian Mathematical Journal, Georgian Math. J. 2021; 28(1): 73–82, DOI: 10.1515/gmj-2019-2013

  • Al Ahmadieh, Abeer; Kummer, Mario; Sorea, Miruna-Ştefana, “A generalization of the space of complete quadrics”, Le Matematiche (Catania) 76 (2021), no. 2, pp. 431-446, 16 pag., https://lematematiche.dmi.unict.it/index.php/lematematiche/article/view/2251

  • Hatun Özlem Güney · Mugur Acu · Daniel Breaz · Shigeyoshi Owa, Applications of fractional derivatives for Alexander integral operator, Afrika Matematika, 32, pages673–683 (2021). https://doi.org/10.1007/s13370-020-00852-8

  • Sh. Najafzadeh, M. Acu, On the Chebyshev polynomial for a certain class of analytic univalent functions, Journal of Function Spaces, Volume 2021, Article Number 3716428. https://onlinelibrary.wiley.com/doi/10.1155/2021/3716428

  • Laurian Suciu, Elisabeta Alina Totoi, Three isometric liftings with invariant isometric part, Banach J. Math. Anal. 2021 15:66. https://doi.org/10.1007/s43037-021-00150-w

  • Catalin Badea, Vladimir Muller, and Laurian Suciu, High order isometric liftings and dilations, Studia Mathematica, 258 (1), 2021, 87-101. DOI: 10.4064/sm200330-25-8

  • Catalin Badea and Laurian Suciu, Hilbert spaces operators with two isometric dilations, Journal of Operator Theory, 86:1 2021, 93–123.doi: 10.7900/jot.2020feb05.2298.

  • Witold Majdak and Laurian Suciu, Convex and expansive liftings close to two-isometries and power bounded operators, Linear Algebra and its Applications, 617, 2021, 1-26. https://doi.org/10.1016/j.laa.2021.01.009

  • Witold Majdak and Laurian Suciu, Triangulations of Operators with Two-Isometric Liftings, Integral Equations and Oper. Theory, 2021, 93:10. https://doi.org/10.1007/s00020-021-02625-9.

  • S.V. Pașca, The modified Bernstein-Stancu operators – General Mathematics Vol.29, no1 (2021), 121-128.

  • F. Sofonea, Some properties in q-calculus "Zahra Noeiaghdam, Morteza Rahmani, Tofigh Allahviranloo, ntroduction of the numerical methods in quantum calculus with uncertainty, Journal of Mathematical Modeling Vol. 9, No. 2, 2021, pp. 303-322", https://jmm.guilan.ac.ir/article_4456_fabfb14b81d47fdae669a51bc70a9df3.pdf

  • F. Sofonea, I. Tincu, On an Inequality for Legendre Polynomials "Grzegorz Sroka, Mariusz Oszust, Approximation of the Constant in a Markov-Type Inequality on a Simplex Using Meta-Heuristics, Mathematics 2021, 9, 264."https://www.mdpi.com/2227-7390/9/3/264

  • A.Totoi, Three-isometric liftings with invariant isometric part Suciu Laurian (ULBS) and Totoi Alina (ULBS) FSTI3 Banach J. Math. Anal. 15 4 2662-2033 https://link.springer.com/article/10.1007/s43037-021-00150-w, https://doi.org/10.1007/s43037-021-00150-w WOS: 000701303000001 1-22.

  • N. A. Secelean, I. M. Olaru, A new approach of some contractive mappings on metric spaces, Mathematics, Volume 9, Issue 12, 1-12, 2021

  • M. Zhou. M. K. Jain, M. S. Khan, N. A. Secelean, Semi-compatible mappings and common fixed point theorems of an implicit relation via inverse C−class functions, AIMS Mathematics, Volume 6, no. 3, 2021

  • N. Niralda, S. Mathew, N. A. Secelean, On boundaries of attractors in dynamical systems, Communications in Nonlinear Science and Numerical Simulation, Volume 94, article no. 105572, 2021

  • Secelean, N.A., Wardowski, D. (2021). A General Approach on Picard Operators. In: Cho, Y.J., Jleli, M., Mursaleen, M., Samet, B., Vetro, C. (eds) Advances in Metric Fixed Point Theory and Applications. Springer, Singapore. https://doi.org/10.1007/978-981-33-6647-3_20, 2021, Print ISBN: 978-981-33-6646-6; Online ISBN: 978-981-33-6647-3

  • A. N. Branga, Fixed Point Results for F-Contractions in Cone Metric Spaces over Topological Modules and Applications to Integral Equations, Fractal and Fractional, Volume 6, no. 1, 2021


    • 2020

  • A.M. Acu, Margareta Heilmann and Ioan Rasa, Linking Baskakov Type Operators, Constructive Theory of Functions, Sozopol 2019 (B. Draganov, K. Ivanov, G. Nikolov and R. Uluchev, Eds.), pp. 23-38 Prof. Marin Drinov Publishing House of BAS, Sofia, 2020

  • A.M. Acu, M. Heilmann, I. Rasa, Strong Converse Results for Linking Operators and Convex Functions, Journal of Function Spaces, Volume: 2020, Article Number: 4049167, 2020.

  • A.M. Acu, I. Rasa, Elementary hypergeometric functions, Heun functions, and moments of MKZ operators, Revista de la Real Academia de Ciencias Exactas Fisicas Y Naturales Serie A-Matematicas, 115(1) 2020, Article Number: 20.

  • A.M. Acu, I. Rasa, A C-0-Semigroup of Ulam Unstable Operators, Symmetry-Basel 12(11) 2020, Article Number: 1844.

  • A.M. Acu, A. Maduta, D. Otrocol, I. Rasa, Inequalities for Information Potentials and Entropies, Mathematics, 8(11) 2020, Article Number: 2056 .

  • A.M. Acu, H. Gonska, Perturbed Bernstein-type operators, Analysis and Mathematical Physics, 10(4) 2020, Article Number: 49.

  • A.M. Acu, M. Dancs, V.A. Radu, Reprezentations for the inverses of certain operators, Communications on Pure and Applied Analysis, 19(8) 2020, 4097-4109.

  • A.M. Acu, G. Bascanbaz-Tunca, Approximation by Complex Perturbed Bernstein-Type Operators, Results in Mathematics, 75(3) 2020, Article Number: 120.

  • A.M. Acu, I. Rasa, Ulam Stability for the Composition of Operators, Symmetry-Basel, 12(7) 2020, Article Number: 1159.

  • A.M. Acu, G. Bascanbaz-Tunca, N. Cetin, Approximation by certain linking operators, Annals of Functional Analysis, 11(4) 2020, 1184-1202.

  • A.M. Acu, M. Heilmann, I. Rasa, Iterates of convolution-type operators, 2020, Positivity.

  • A.M. Acu, L. Hodis, I. Rasa, Multivariate weighted Kantorovich operators, Mathematical Foundations of Computing, 3(2) 2020, 117-124.

  • V. Gupta, A.M. Acu, H.M. Srivastava, Difference of Some Positive Linear Approximation Operators for Higher-Order Derivatives, Symmetry-Basel, 12(6) 2020, Article Number: 915 .

  • A.M. Acu, S. Hodis, I. Rasa, Estimates for the Differences of Certain Positive Linear Operators, Mathematics, 8(5) 2020, Article number 798.

  • T. Neer, A.M. Acu, P.N. Agrawal, Baskakov-Durrmeyer type operators involving generalized Appell Polynomials, Mathematical Methods in the Applied Sciences, 43(6) 2020, 2911-2923.

  • P.N. Agrawal, A.M. Acu, R. Ruchi, q-Generalized Bernstein-Durrmeyer Polynomials, Journal of Mathematical Inequalities, Volume: 14 Issue: 1 Pages: 211-235 Published: MAR 2020.

  • A.M. Acu, Radu V.A. Approximation by Certain Operators Linking the α-Bernstein and the Genuine α-Bernstein–Durrmeyer Operators. In: Deo N., Gupta V., Acu A., Agrawal P. (eds) Mathematical Analysis I: Approximation Theory. ICRAPAM 2018. Springer Proceedings in Mathematics & Statistics, vol 306. Springer, Singapore. https://doi.org/10.1007/978-981-15-1153-0 7

  • E.-L. Pop, D. Duca, A. Ratiu, Calculus for the intermediate point associated with a mean value theorem of the integral calculus, General Mathematics, 28(1), 59-66, 2020. https://generalmathematics.ro/volume-28-no-1-2020/

  • A. Ratiu, N. Minculete, About Aczel inequality and some bounds for several statistical indicators, Mathematics, 8(4), 574, 2020. https://www.mdpi.com/2227-7390/8/4/574

  • I. Maniu, E.-L. Pop, A. Ratiu, E. T. Stefanescu, Insights from IT jobs market with text mining, SEA-Practical Application of Science, VIII (24), 287-298, 2020. https://spas.seaopenresearch.eu/volume-viii#

  • A.N. Branga, I.M. Olaru, An application of the fixed point theory to the study of monotonic solutions for systems of differential equations, Mathematics, ISSN 2227-7390, vol. 8, no. 7, art. 1183, pp 1-8, 2020. (Clarivate Analytics - Web of Science Core Collection - Science Citation Index Expanded)

  • A.N. Branga, I.M. Olaru, Cone metric spaces over topological modules and fixed point theorems for Lipschitz mappings, Mathematics, ISSN 2227-7390, vol. 8, no. 5, art. 724, pp 1-14, 2020. (Clarivate Analytics - Web of Science Core Collection - Science Citation Index Expanded)

  • A.N. Branga, A.Totoi, Numerical methods. Seminar lecture notes and practical laboratory work (in Romanian), Techno Media Publishing House, Sibiu, Romania, ISBN 978-606-616-384-2, 202 pg, 2020.

  • Sorea, Miruna-Ştefana , “Constructing separable Arnold snakes of Morse polynomials”, Portugaliae Mathematica 77 (2020), no. 2, pp. 219-260, 42 pag., https://ems.press/journals/pm/articles/17210

  • Çelik, Türkü Özlüm; Galuppi, Francesco; Kulkarni, Avinash; Sorea, Miruna-Ştefana,“On the eigenpoints of cubic surfaces”, Le Matematiche (Catania) 75 (2020), no. 2, pp.611-625, 15 pag., https://lematematiche.dmi.unict.it/index.php/lematematiche/article/view/2003

  • M. Acu, G. Oros, Starlikeness Condition for a New Differential-Integral Operator, Mathematics, 2020, Volume 8, Issue 5, 694. https://www.mdpi.com/2227-7390/8/5/694

  • Laurian Suciu, Liftings and extensions of operators in Brownian setting, pp. 1-18, 2020, Linear and Multilinear Algebra. https://doi.org/10.1080/03081087.2020.1819948

  • Laurian Suciu, On operators with two-isometric liftings, Complex Analysis and Operator Theory, 14:5, 1-16, 2020. https://doi.org/10.1007/s11785-019-00960-9

  • Witold Majdak and Laurian Suciu, Brownian type parts of operators in Hilbert spaces, Results in Mathematics, 75:5, 1-23, 2020. https://doi.org/10.1007/s00025-019-1130-8

  • F. Sofonea, Ioan Tincu, On an Inequality for Legendre Polynomial, FSTI3, MATHEMATICS 8, 11, 2227-7390, https://www.mdpi.com/2227-7390/8/11/2044, 10.3390/math8112044 WOS:000593145600001 1-11.

  • N. A. Secelean, A New Kind of Nonlinear Quasicontractions in Metric Spaces, Mathematics, Volume 8, no. 5, 1-10, 2020

  • N. A. Secelean, D. Wardowski, Expansive mappings on bounded sets and their application to rational integral equations, Revista de la Real Academia de Ciencias Exactas Fisicas y Naturales Serie A-Mattematicas, Volume 114, no. 3, 2020

  • M. Zhou, L. Xiao-lan, N.A. Secelean, Fixed Point Theorems for Generalized Kannan-Type Mappings in a New Type of Fuzzy Metric Space, Journal of Mathematics, Vol. 2020, Articol number: 1712486, Published May 31 2020, p.1-16, DOI:10.1155/2020/1712486

    • 2019

    A.Ratiu, A.M. Acu, T.Acar, D.F.Sofonea, Certain positive linear operators with better approximation properties, Mathematical Methods in the applied sciences, Volume: 42 Issue: 16 Special Issue: SI Pages: 5133-5142 Published: NOV 15 2019 https://onlinelibrary.wiley.com/doi/abs/10.1002/mma.5243

    A.M. Acu, T. Acar, C.V. Muraru, V.A. Radu, Some approximation properties by a class of bivariate operators, Mathematical Methods in The Applied Sciences, Volume: 42 Issue: 16 Special Issue: SI Pages: 5551-5565 Published: NOV 15 2019. https://onlinelibrary.wiley.com/doi/abs/10.1002/mma.5515

    A.M. Acu, H. Gonska, Classical Kantorovich operators revisited, Ukrainian Mathematical Journal, Volume: 71 Issue: 6, Pages: 843-852 Published: NOV 2019 https://link.springer.com/article/10.1007/s11253-019-01683-y

  • A.M. Acu, I. Rasa, Estimates for the differences of positive linear operators and their derivatives, Numerical Algorithms, (2019). https://link.springer.com/article/10.1007/s11075-019-00809-4

  • Neer, Trapti; Acu, Ana Maria; Agrawal, P. N., Degree of approximation by Chlodowsky variant of Jakimovski-Leviatan-Durrmeyer type operators, Revista De La Real Academia De Ciencias Exactas Fisicas Y Naturales Serie A-Matematicas, Volume: 113 Issue: 4 Pages: 3445-3459 Published: OCT 2019. https://link.springer.com/article/10.1007/s13398-019-00709-1

  • T. Garg, A.M. Acu, P.N. Agrawal, Weighted approximation and GBS of Chlodowsky-Szasz-Kantorovich type operators, Analysis and Mathematical Physics, Volume: 9 Issue: 3 Pages: 1429-1448 Published: SEP 2019 https://link.springer.com/article/10.1007%2Fs13324-018-0246-4

  • A.M. Acu, O. Dogru, C.V. Muraru, V.A. Radu, Approximation properties of certain Bernstein-Stancu type operators, Journal of Mathematical Inequalities, Volume: 13 Issue: 3 Pages: 687-702 Published: SEP 2019. http://jmi.ele-math.com/13-46/Approximation-properties-of-certain-Bernstein-Stancu-type-operators

  • A.M. Acu, V. Gupta, G. Tachev, Better Numerical Approximation by Durrmeyer Type Operators, Results in Mathematics, Volume: 74 Issue: 3 Article Number: UNSP 90 Published: SEP 2019 https://link.springer.com/article/10.1007/s00025-019-1019-6?shared-article-renderer

  • Rahman, Shagufta; Mursaleen, Mohammad; Acu, Ana Maria, Approximation properties of lambda-Bernstein-Kantorovich operators with shifted knots, Mathematical Methods in the Applied Sciences, Volume: 42 Issue: 11 Pages: 4042-4053 Published: JUL 30 2019 https://onlinelibrary.wiley.com/doi/abs/10.1002/mma.5632

  • T. Garg, A.M. Acu, P.N. Agrawal, Further results concerning some general Durrmeyer type operators, Revista De La Real Academia De Ciencias Exactas Fisicas Y Naturales Serie A-Matematicas, Volume: 113 Issue: 3 Pages: 2373-2390 Published: JUL 2019 https://link.springer.com/article/10.1007/s13398-019-00628-1

  • A.M. Acu, T. Acar, V.A. Radu, Approximation by modified U-n (rho) operators, Revista De La Real Academia De Ciencias Exactas Fisicas Y Naturales Serie A-Matematicas, Volume: 113 Issue: 3 Pages: 2715-2729 P ublished: JUL 2019 https://link.springer.com/article/10.1007/s13398-019-00655-y

  • Vijay Gupta, Gancho Tachev, Ana-Maria Acu, Modified Kantorovich operators with better approximation properties, Numerical Algorithms, Volume: 81 Issue: 1 Pages: 125-149 Published: MAY 2019 https://link.springer.com/article/10.1007/s11075-018-0538-7

  • N. Rao, A. Wafi, A.M. Acu, q-Szasz-Durrmeyer Type Operators Based on Dunkl Analogue, Complex Analysis and Operator Theory, Volume: 13 Issue: 3 Pages: 915-934 Published: APR 2019 https://link.springer.com/article/10.1007/s11785-018-0816-3

  • A.M. Acu, N. Manav, A. Ratiu, Convergence Properties of Certain Positive Linear Operators, Results in Mathematics, Volume: 74 Issue: 1 Article Number: UNSP 8 Published: MAR 2019 https://link.springer.com/article/10.1007/s00025-018-0931-5

  • A.M. Acu, Ana-Maria; Radu, Voichita Adriana, About the Iterates of Some Operators Depending on a Parameter and Preserving the Affine Functions, Iranian Journal of Science and Technology Transaction A-Science, Volume: 43 Issue: A1 Pages: 265-271 Published: FEB 2019 https://link.springer.com/article/10.1007/s40995-017-0461-0

  • V. Gupta, A.M. Acu, On Difference of Operators with Different Basis Functions, FILOMAT Volume: 33 Issue: 10 Pages: 3023-3034 Published: 2019 http://journal.pmf.ni.ac.rs/filomat/index.php/filomat/article/view/9535 "> http://journal.pmf.ni.ac.rs/filomat/index.php/filomat/article/view/9535

  • A.M. Acu, P.N. Agrawal, D. Kumar, Approximation properties of modified q-Bernstein-Kantorovich operators, Communications Faculty of Sciences University of Ankara-Series A1 Mathematics and Statistics, Volume: 68 Issue: 2 Pages: 2170-2197 Published: 2019 http://static.dergipark.org.tr/article-download/9222/f102/9527/5d25bf28cbe38.pdf?"> http://static.dergipark.org.tr/article-download/9222/f102/9527/5d25bf28cbe38.pdf?

  • A.M. Acu, P.N. Agrawal, Better approximation of functions by genuine Bernstein-Durrmeyer type operators, Carpathian Journal of Mathematics, Volume: 35 Issue: 2 Pages: 125-136 Published: 2019 https://www.jstor.org/stable/26898763?seq=1

  • P.N. Agrawal, A.M. Acu, M. Sidharth, Approximation degree of a Kantorovich variant of Stancu operators based on Polya-Eggenberger distribution, Revista De La Real Academia De Ciencias Exactas Fisicas Y Naturales Serie A-Matematicas, Volume: 113 Issue: 1 Pages: 137-156 Published: JAN 2019 https://link.springer.com/article/10.1007/s13398-017-0461-0

  • Pooja Gupta, Ana Maria Acu, P.N. Agrawal, Jakimovski-Leviatan operators of Kantorovich type involving multiple Appell polynomials, Georgian Mathematical Journal, 2019, DOI: 10.1515/gmj-2019-2013 https://www.degruyter.com/view/journals/gmj/ahead-of-print/article-10.1515-gmj-2019-2013/article-10.1515-gmj-2019-2013.xml

  • Witold Majdak and Laurian Suciu, Brownian isometric parts of concave operators, New York J. Math. 25, 1067–1090, 2019. http://nyjm.albany.edu/j/2019/25-46.html

  • Catalin Badea and Laurian Suciu, Similarity problems, Folner sets and isometric representations of amenable semigroups, Mediterranean Journal of Mathematics 16: 5, 2019. https://doi.org/10.1007/s00009-018-1294-6

  • Catalin Badea and Laurian Suciu, The Cauchy dual and 2-isometric liftings of concave operators, Journal of Math. Anal. and Appl. 472, 1458-1474, 2019. https://doi.org/10.1016/j.jmaa.2018.12.002

  • N.A. Secelean, M. Zhou, Generalized F-Contractions on Product of Metric Spaces, Mathematics 2019, 7, 1040; 1-8; https://www.mdpi.com/2227-7390/7/11/1040/html

  • M. Zhou, X.L. Liub, N.A. Secelean, On coincidence and common fixed point theorems of eight self-maps satisfying an F_M-contraction condition, Nonlinear Analysis: Modelling and Control 2019, Vol. 24, No. 6,1001–1018 https://pdfs.semanticscholar.org/5f5d/999280d24d02dd18cd75aacda25890e538bd.pdf?_ga=2.87196632.176953674.1588599116-2127475333.1588425489

  • N.A. Secelean, S. Mathew, D. Wardowski, New fixed point results in quasi-metric spaces and applications in fractals theory, Advances in Difference Equations 2019, 2019:177, 1-23, https://doi.org/10.1186/s13662-019-2119-z

  • I. M. Olaru (Continental Automotive Systems SRL), A. N. Branga, A. Oprea (Continental Automotive Systems SRL), Common fixed point results in b-cone metric spaces over topological vector spaces, S. Aleksić, Z. Kadelburg, Z. D. Mitrović, S. Radenović, A new survey: Cone metric spaces, Journal of International Mathematical Virtual Institute, ISSN (p) 2303-4866, ISSN (o) 2303-4947, vol. 9, pp 93-121, 2019 http://www.imvibl.org/journal/9_19/journal_imvi_89_2019_93_121.pdf

  • M. Acu, Shigeyoshi Owa (Honorary Professor "1 Decembrie 1918" University of Alba Iulia), On some subclasses of univalent functions, Faisal Al-kasasbeh, Subclasses of P-valent Functions within Integral Operators, International Journal of Mathematics and Computer Science, 14(2019), no. 2, 317–327, http://ijmcs.future-in-tech.net/14.2/R-Al-kasasbeh.pdf

  • M. Acu, Shigeyoshi Owa (Honorary Professor "1 Decembrie 1918" University of Alba Iulia), On some subclasses of univalent functions, Hamzat J.O. and Adeyemo A. A., New Subclasses of Analytic Functions with Respect to Symmetric and Conjugate Points Defined by Extended Salagean Derivative Operator, International Journal of Mathematical Analysis and Optimization: Theory and Applications Vol. 2019, No. 2, pp. 644 - 656 http://journals.unilag.edu.ng/index.php/ijmao

  • M. Acu, Shigeyoshi Owa (Honorary Professor "1 Decembrie 1918" University of Alba Iulia), Note on a class of starlike functions, Adnan Ghazy Alamoush, Univalent Functions Defined by a Generalized Multipler Differential Operator, EARTHLINE JOURNAL OF MATHEMATICAL SCIENCES, Vol. 2, No. 1(2019), pp. 1-13 https://www.earthlinepublishers.com/index.php/ejms/article/view/95

  • M. Acu, On a subclass of n-uniformly close to convex functions, Hari M. Srivastava, Nazar Khan, Maslina Darus, Muhammad Tariq Rahim, Qazi Zahoor Ahmad and Yousra Zeb, Mathematics, Volume 7 Issue 8 (2019), https://www.mdpi.com/2227-7390/7/8/706

  • M. Acu, On a subclass of n-uniformly close to convex functions, Hari M. Srivastava, Bilal Khan, Nazar Khan, Qazi Zahoor Ahmad, and Muhammad Tahir, A generalized conic domain and its applications to certain subclasses of analytic functions, Rocky Mountain J. Math. Volume 49, Number 7 (2019), 2325-2346, https://projecteuclid.org/journals/rocky-mountain-journal-of-mathematics/volume-49/issue-7/A-generalized-conic-domain-and-its-applications-to-certain-subclasses/10.1216/RMJ-2019-49-7-2325.short#references

  • M. Acu, Subclass of starlike functions associated with some hyperbola, V. A. Chougule, U. H. Naik, ON SUBCLASSES OF UNIVALENT FUNCTION DEFINED USING GENERALIZED DIFFERENTIAL AND INTEGRAL OPERATOR, IJRAR March 2019, Volume 6, Issue 1, 98-101, http://www.ijrar.org/archive.php?vol=6&issue=1

  • M. Acu, S. Najafzadeh (Payame Noor Univ. Iran), Univalent holomorphic functions with fixed finitely many coefficients involving Salagen operator, V. A. Chougule, U. H. Naik, ON SUBCLASSES OF UNIVALENT FUNCTION DEFINED USING GENERALIZED DIFFERENTIAL AND INTEGRAL OPERATOR, IJRAR March 2019, Volume 6, Issue 1, 98-101, http://www.ijrar.org/archive.php?vol=6&issue=1

  • B. Şeker(Batman Univ. Turkey), M. Acu, and S. Sumer Eker (Dicle Univ. Turkey), Subclasses of k-uniformly convex and k-starlike functions defined by Salagean operator, S. Kanas, Ş. Altinkaya & S. Yalçin , Subclass of k-Uniformly Starlike Functions Defined by the Symmetric q-Derivative Operator, Ukrainian Mathematical Journal volume 70, pages1727–1740(2019) https://link.springer.com/article/10.1007/s11253-019-01602-1

  • A. Ratiu, A.M. Acu, A. Tuncer(Selcuk Univ-Turkey); D. F. Sofonea (ULBS), Certain positive linear operators with better approximation properties, MATHEMATICAL METHODS IN THE APPLIED SCIENCES, Volum 42, nr.16, ISSN 0170-4214, https://onlinelibrary.wiley.com/doi/epdf/10.1002/mma.5243

  • Ana-Maria Acu (ULBS);Manav Nesibe(Gazi Univ-Turkey); Ratiu Augusta(ULBS), Convergence Properties of Certain Positive Linear Operators, RESULTS IN MATHEMATICS, Volum 74, nr.1, ISSN 1422-6383, https://link.springer.com/article/10.1007/s00025-018-0931-5

  • Ana-Maria Acu(ULBS);Manav Nesibe(Gazi Univ-Turkey); Ratiu Augusta(ULBS), Convergence Properties of Certain Positive Linear Operators, Acar Tuncer, Cappelletti Montano Mirella, Garrancho Pedro, Leonessa Vita; On Sequences of J. P. https://www.hindawi.com/journals/jfs/2019/2329060/

  • Ana-Maria Acu (ULBS);Manav Nesibe(Gazi Univ-Turkey); Ratiu Augusta(ULBS), Convergence Properties of Certain Positive Linear Operators, RESULTS IN MATHEMATICS, Volum 74, nr.1, ISSN 1422-6383, https://link.springer.com/article/10.1007/s00025-018-0931-5

  • N. A. Secelean (ULBS), Mi Zhou (School of Science and Technology, University of Sanya, Hainan 572000, China), Generalized F-contractions on Product of Metric Spaces, Mathematics, Vol. 7 Issue 11,ISSN: eISSN: 2227-7390, pag.1-8, 2019, https://www.mdpi.com/2227-7390/7/11/1040

  • M. Zhou (Univ Sanya, Sch Sci & Technol, Sanya 572000, Hainan, Peoples R China), X.L. Liub (Sichuan Univ Sci & Engn, Coll Math & Stat, Zigong 643000, Sichuan, Peoples R China), N.A. Secelean (ULBS), On coincidence and common fixed point theorems of eight self-maps satisfying an F_M-contraction , NONLINEAR ANALYSIS-MODELLING AND CONTROL, Vol 24, Issue 6, ISSN: 1392-5113, pag.1001-1018, 2019. https://www.journals.vu.lt/nonlinear-analysis/article/view/14848

  • N.A. Secelean (ULBS), S. Mathew (Natl Inst Technol Calicut, Dept Math, Calicut, Kerala, India), D. Wardowski (Univ Lodz, Dept Nonlinear Anal, Fac Math & Comp Sci, Lodz, Poland), New fixed point results in quasi-metric spaces and applications in fractals theory, ADVANCES IN DIFFERENCE EQUATIONS, 2019:77, ISSN: 1687-1847, https://advancesindifferenceequations.springeropen.com/track/pdf/10.1186/s13662-019-2119-z

  • N.A. Secelean (ULBS), Iterated function systems consisting of F-contractions, Fixed Point Theory and Applications, 2013, 2013:277, DOI:10.1186/1687-1812-2013-277, F-Contractive Mappings on Closed Ball in Complete Dislocated b-Metric Spaces, Mathematics, Volume 7 Issue 1 10.3390/math7010056, 2019 https://www.mdpi.com/2227-7390/7/1/56

    2018

    • Florin Sofonea, Ioan Tincu, Acu Ana Maria, Convex sequences of higher order, Filomat 32:13 (2018) http://journal.pmf.ni.ac.rs/filomat/index.php/filomat/article/view/7477

    A.M. Acu, Nesibe Manav, Florin Sofonea, Approximation properties of λ-Kantorovich operators, Journal of Inequalities and Applications, 2018:202, https://doi.org/10.1186/s13660-018-1795-7

    Ana Maria Acu, Tuncer Acar and Nesibe Manav, Approximation of functions by genuine Bernstein-Durrmeyer type operators, Journal of Mathematical Inequalities, 12(4), 975-987, 2018. http://jmi.ele-math.com/12-74/Approximation-of-functions-by-genuine-Bernstein-Durrmeyer-type-operators

  • Sheetal Deshwal, Ana Maria Acu and P.N. Agrawal, Pointwise approximation Bezier variant of an operator based on Laguerre polynomials, Journal of Mathematical Inequalities, 12(3), 2018, 693–707 http://jmi.ele-math.com/12-53/Pointwise-approximation-by-Bezier-variant-of-an-operator-based-on-Laguerre-polynomials

  • S. Deshwal, A.M. Acu, P.N. Agrawal, Rate of convergence of q-analogue of a class of new Bernstein type operators, Miskolc Mathematical Notes, 19(1) (2018), 211–234 http://real.mtak.hu/87327/1/2265.pdf

  • A.M. Acu, C. Muraru, Certain Approximation Properties of Srivastava Gupta operators, Journal of Mathematical Inequalities, Volume 12, Number 2 (2018), 583–595 http://jmi.ele-math.com/12-44/Certain-approximation-properties-of-Srivastava-Gupta-operators

  • T Neer, AM Acu, P Agrawal, Approximation of functions by bivariate q-Stancu-Durrmeyer type operators, Mathematical Communications, 23(2018), 161–180. https://www.mathos.unios.hr/mc/index.php/mc/article/view/2410

  • A.M. Acu, V. Gupta, On Baskakov-Szasz-Mirakyan-type operators preserving exponential type functions, Positivity, 22(3), 2018, 919–929, https://link.springer.com/article/10.1007/s11117-018-0553-x

  • AM Acu, V Gupta, N Malik, Local and Global Approximation for Certain (p, q)-Durrmeyer Type Operators, Complex Analysis and Operator Theory, Volume: 12 Issue: 8, 1973-1989, 2018, https://doi.org/10.1007/s11785-017-0714-0

  • Ana Maria Acu, V. Radu, C. Muraru, On the monotonicity of q-Schurer-Stancu type polynomials, Miskolc Mathematical Notes, 19(1), (2018), 19-28, http://mat76.mat.uni-miskolc.hu/mnotes/article/1785

  • N.A. Secelean, Suzuki \psi F-contractions and some fixed point results, Carpathian Journal of Mathematics, Vol. 34 (2018), No.1, 93-102 https://www.carpathian.cunbm.utcluj.ro/article/suzuki-%D1%B1-f-contractions-fixed-point-results/

    2017

    • Manjari Sidharth, Ana-Maria Acu, P.N. Agrawal, Chlodowsky-Szasz-Appel type operators for functions of two variables, Annals of Functional Analysis 8(4). 2017, 446-459. https://projecteuclid.org/euclid.afa/1495677675

    T. Neer, A.M. Acu, P.N. Agrawal, Bezier variant of genuine-Durrmeyer type operators based on Polya distribution, Carpathian Journal of Mathematics, Vol. 33, No 1, 2017, Pages: 73-86. https://www.carpathian.cunbm.utcluj.ro/article/bezier-variant-genuine-durrmeyer-type-operators-based-polya-distribution/

    A.M. Acu, Properties and applications of Pn-simple functionals, Positivity ISSN: 1385-1292, DOI 10.1007/s11117-016-0420-6, 21 (1), 2017, 283-297. https://link.springer.com/article/10.1007/s11117-016-0420-6

  • Ana Maria Acu, P.N. Agrawal, Trapti Neer, Approximation properties of the modified Stancu operators, Numerical Functional Analysis and Optimization, Doi:10.1080/01630563.2016.1248564, 38 (3), Pages: 279-292, 2017 https://www.tandfonline.com/doi/abs/10.1080/01630563.2016.1248564

  • Young Chel Kwun , Ana-Maria Acu, Arif Rafiq, Voichita Adriana Radu, Faisal Ali and Shin Min Kang, Bernstein-Stancu type operators which preserve polynomials, J. Computational Analysis and Applications, 23(4), 2017, 758-770.) http://www.eudoxuspress.com/244/JOCAAA-2017-VOL-23.pdf

  • A.M. Acu, H. Gonska, Generalized Alomari functionals, Mediterranean Journal of Mathematics, 14(1), 2017, Article Number: UNSP 1, https://link.springer.com/article/10.1007/s00009-016-0833-2

  • A.M. Acu, V. Gupta, Direct results for certain summation-integral type Baskakov-Szasz operators, Results in Mathematics, 72(3), 2017, 1161–1180, DOI: 10.1007/s00025-016-0603-2 https://link.springer.com/article/10.1007/s00025-016-0603-2

  • V. Gupta, A.M. Acu, D.F. Sofonea, Approximation Baskakov type Polya-Durrmeyer operators, Applied Mathematics and Computations, 294( 1), 2017, 318–331 https://www.sciencedirect.com/science/article/abs/pii/S0096300316305720

  • Arun Kajla, Ana Maria Acu, and P. N. Agrawal, Baskakov–Szász-type operators based on inverse Pólya–Eggenberger distribution, Annals of Functional Analysis 8 (1), 2017, 106-123. https://projecteuclid.org/euclid.afa/1477918638

  • Dan Barbosu, Ana-Maria Acu, Carmen Violeta Muraru, Some bivariate Durrmeyer operators based on q-integers, Jourmal of Mathematical Inequalities, 11( 1), 2017, 59–75 http://jmi.ele-math.com/11-06/Some-bivariate-Durrmeyer-operators-based-on-q-integers

  • D. Bărbosu, A.M. Acu, C. V. Muraru, On certain GBS-Durrmeyer operators based on q-integers,Turkish Journal of Mathematics, 41(2) (2017), 368 – 380 https://dergipark.org.tr/en/pub/tbtkmath/issue/35834/401624

  • Catalin Badea and Laurian Suciu, Harnack and Shmul'yan preorder relations for Hilbert space contractions, Indagationes Mathematicae 28 (4), 892-912, 2017, https://doi.org/10.1016/j.indag.2017.06.012

  • Laurian Suciu, Ergodic behaviors of the regular operator means, Banach Journal of Mathematical Analysis, Vol. 11, No. 2, 239-265, 2017. https://projecteuclid.org/euclid.bjma/1484363107

  • Catalin Badea, Laurian Suciu, and Dan Timotin, Classes of contractions and Harnack domination, Revista Matematica Iberoamericana, 33 (2), 469-488, 2017. https://www.ems-ph.org/journals/show_abstract.php?issn=0213-2230&vol=33&iss=2&rank=4

  • N.A. Secelean, D. Wardowski, New Fixed Point Tools in Non-metrizable Spaces, Results. Math. Vol. 72 (2017), 919–935, Issue 1-2, https://link.springer.com/article/10.1007/s00025-017-0688-2

  • R. Balu, S. Mathew, N.A. Secelean, Separation properties of (n, m)-IFS attractors, Communications in Nonlinear Science and Numerical Simulation, Vol. 51 (2017), 160- 168, http://doi.org/10.1016/j.cnsns.2017.04.009

  • Petrica Dicu, Alina Totoi, Inclusion properties regarding classes of meromorphic p-valent functions, involving the operator J^n_{p,\lambda}, Commun. Korean Math. Soc., Vol. 32, No. 4(2017), pp. 971-977. https://www.koreascience.or.kr/article/JAKO201732839400520.page

    2016

    • A.M. Acu, I. Rasa, New estimates for the differences of positive linear operators, Numerical Algorithms, 73(3), 775–789, 2016. https://link.springer.com/article/10.1007/s11075-016-0117-8

    Shin Min Kang, Arif Rafiq, Ana-Maria Acu, Faisal Ali, Young Chel Kwun, Some approximation properties of (p, q) -Bernstein operators, Journal of Inequalities and Applications, 2016, Article 169. https://journalofinequalitiesandapplications.springeropen.com/articles/10.1186/s13660-016-1111-3

    A.M. Acu, C. Muraru, V. Radu, F. Sofonea, Some approximation properties of a Durrmeyer variant of q-Bernstein–Schurer operators, Mathematical Methods in the Applied Sciences, 39(18), 2016, 5636–5650. https://onlinelibrary.wiley.com/doi/abs/10.1002/mma.3949

  • Ana Maria Acu, Heiner Gonska, Composite Bernstein Cubature, Banach Journal of Mathematical Analysis, Banach Journal of Mathematical Analysis, Vol. 10, No.2, 235-250, 2016 https://projecteuclid.org/euclid.bjma/1456246278

  • Shin Min Kang, Ana Maria Acu, Arif Rafiq and Young Chel Kwun, On q-analogue of Stancu-Schurer-Kantorovich operators based on q-Riemann integral, Journal of Computational Analysis and Applications, Vol. 21, No. 3, 2016, 564-577. http://www.eudoxuspress.com/244/VOLUME-21-JOCAAA-2016.pdf

  • Laurian Suciu, Estimations of the operator resolvent by higher order Cesaro means, Results in Mathematics 69(3), pp. 457-475, 2016. https://link.springer.com/article/10.1007/s00025-016-0533-z

  • Witold Majdak, Mostafa Mbekhta, and Laurian Suciu, Operators intertwining with isometries and Brownian parts of 2-isometries, Linear Algebra and its Applications 509 (15), 168-190, 2016. https://www.sciencedirect.com/science/article/abs/pii/S0024379516302762

  • Alexandru Aleman and Laurian Suciu, On ergodic operator means in Banach spaces, Integral Equations and Operator Theory, vol. 85 pp. 259-287, 2016. https://doi.org/10.1007/s00020-016-2298-x

  • Mostafa Mbekhta and Laurian Suciu, Partial isometries and the conjecture of C. K. Fong and S. K. Tsui, Journal of Mathematical Analysis and Applications Vol. 437, pp. 431-444, 2016. https://doi.org/10.1016/j.jmaa.2015.12.057

  • N.A. Secelean, D. Wardowski, \psi F-Contractions: Not Necessarily Nonexpansive Picard Operators, Results. Math., Vol. 70 (2016), Issue 3, 415–43, https://link.springer.com/article/10.1007/s00025-016-0570-7

  • N.A. Secelean, Weak F-contractions and some fixed point results, Bulletin of the Iranian Mathematical Society, Vol. 42 (2016), Issue 3, 779-798 http://bims.iranjournals.ir/article_812.html

    2015

    • Ana Maria Acu, F. Sofonea, D. Barbosu, Note on a q-analogue of Stancu-Kantorovich operators, Miskolc Mathematical Notes, Vol. 16, no.1, 2015, 3-15. http://real.mtak.hu/87799/

    Ana Maria Acu, Improvement of Gruss and Ostrowski Type Inequalities, Filomat, 29:9, 2015, 2027-2035 http://journal.pmf.ni.ac.rs/filomat/index.php/filomat/article/view/921

    Ana Maria Acu, Heiner Gonska, Weighted Ostrowski-Gruss type inequalities, Stud. Univ. Babes-Bolyai Math., 60(2015), No. 2, 183–192 http://www.cs.ubbcluj.ro/~studia-m/2015-2/03-Acu-Gonska-final.pdf

  • Shin Min Kang, Ana Maria Acu, Arif Rafiq, Young Chel Kwun, Approximation properties of q-Kantorovich-Stancu operator , Journal of Inequalities and Applications, Article Number: 211, Published: Jun 27 2015 https://link.springer.com/article/10.1186/s13660-015-0729-x

  • Ana Maria Acu, Muraru Carmen , Approximation Properties of Bivariate Extension of q-Bernstein–Schurer–Kantorovich operators, Results in Mathematics, 67 (3) , 265-279, 2015, DOI: 10.1007/s00025-015-0441-7 https://link.springer.com/article/10.1007/s00025-015-0441-7

  • Ana Maria Acu, Stancu–Schurer–Kantorovich operators based on q-integers, Applied Mathematics and Computation, 259, 896–907, 2015, DOI: 10.1016/j.amc.2015.03.032 https://www.sciencedirect.com/science/article/abs/pii/S0096300315003379

  • Michael Lin, David Shoikhet, and Laurian Suciu, Remarks on uniform ergodic theorems, Acta Sci. Math. (Szeged) Vol. 81, pp. 251-283, 2015. DOI: 10.14232/actasm-012-307-4 http://pub.acta.hu/acta/showCustomerArticle.action?id=40193&dataObjectType=article

  • Michael Lin and Laurian Suciu, Poisson's equation for mean ergodic operators, Contemporary Mathematics Vol. 636, pp. 141-148, 2015.

  • N.A. Secelean, Generalized F-iterated function systems on product of metric spaces, Journal of Fixed Point Theory and Applications, 17 (2015) 575–595, DOI: 10.1007/s11784-015-0235-2 https://link.springer.com/article/10.1007/s11784-015-0235-2

  • A. Ratiu, N. Minculete, Several refinements and counterparts of Radon’s inequality, Mathematica Bohemica, 140(1), 71-80, 2015. http://mb.math.cas.cz/full/140/1/mb140_1_6.pdf

    2014

    • Ana Maria Acu, Maria Daniela Rusu, New results concerning Chebyshev-Grusstype inequalities via discrete oscillations, Applied Mathematics and Computation, 243, pp. 585-593, 2014 https://www.sciencedirect.com/science/article/abs/pii/S0096300314008443

    Mostafa Mbekhta and Laurian Suciu, Quasi-isometries associated to Acontractions, Linear Algebra and its Applications Vol. 459, pp. 430-453, 2014. https://doi.org/10.1016/j.laa.2014.07.016

    Laurian Suciu and Nicolae Suciu, Borel-Carathéodory and Fan Type Inequalities for Hilbert space bicontractions, Complex Analysis and Operator Theory Vol. 8, Issue 1, pp. 227-241, 2014. https://doi.org/10.1007/s11785-013-0291-9

  • E.C. Popa, N.A. Secelean, Estimates for the constants of Landau and Lebesgue via some inequalities for the Wallis ratio, Journal of Computational and Applied Mathematics, Vol. 269 (2014), 68-74, DOI: 10.1016/j.cam.2014.03.020 https://www.sciencedirect.com/science/article/pii/S0377042714001691

  • N.A. Secelean, Generalized Iterated Function Systems on the space l^{\infty}(X), Journal of Mathematical Analysis and Applications, Vol. 410, Issue 2, 15. Feb. 2014, 847-858, DOI:10.1016/j.jmaa.2013.09.007 https://www.sciencedirect.com/science/article/pii/S0022247X13008196

  • M. Olaru, N.A. Secelean, Vector comparison operators in cone metric spaces, Mathematical Report, Vol. 16 (66), No.3 (2014), 431-442. http://imar.ro/journals/Mathematical_Reports/Pdfs/2014/3/6.pdf

  • N.A. Secelean, Invariant measure associated with a Generalized Countable Iterated Function System, Mediterranean Journal of Mathematics, 11 (2014), 361-372, DOI 10.1007/s00009-013-0300-2 https://link.springer.com/article/10.1007/s00009-013-0300-2