Edit Profile (opens in new tab) Cobzaş, Ştefan Co-Author Distance Author ID: cobzas.stefan Published as: Cobzaş, S.; Cobzaş, Ştefan; Cobzas, S.; Cobzaş, Stefan; Cobzaş, Ş.; Cobzas, Stefan more...less Homepage: https://ictp.acad.ro/stefan-cobzas/ External Links: MGP · Google Scholar · ResearchGate · dblp Documents Indexed: 70 Publications since 1974, including 3 Books 1 Contribution as Editor Reviewing Activity: 551 Reviews Biographic References: 1 Publication Co-Authors: 13 Co-Authors with 19 Joint Publications 193 Co-Co-Authors all top 5 Co-Authors 52 single-authored 6 Muntean, Ioan 6 Mustăţa, Costică 1 Aggarwal, Manisha 1 Czerwik, Stefan 1 Lin, Fucai 1 Lin, Shou 1 Liu, Chuan 1 Mabula, M. D. 1 Miculescu, Radu 1 Nicolae, Adriana 1 Rus, Mircea Dan 1 Soubeyran, Antoine 1 Truong Quang Bao all top 5 Serials 10 Revue d’Analyse Numérique et de Théorie de l’Approximation 7 Topology and its Applications 5 Mathématica – Revue d’Analyse Numérique et de Théorie de l’Approximation. L’Analyse Numérique et la Théorie de l’Approximation 5 Studia Universitatis Babeș-Bolyai. Mathematica 3 Journal of Mathematical Analysis and Applications 3 Mathématica – Revue d’Analyse Numérique et de Théorie de l’Approximation. Mathématica 2 Journal of Approximation Theory 2 Quaestiones Mathematicae 2 Buletinul Științific al Universității din Baia Mare. Seria B. Fascicola Matematică - Informatică 2 Preprint. “Babeș-Bolyai” University. Faculty of Mathematics and Physics. Research Seminars 1 Acta Universitatis Carolinae. Mathematica et Physica 1 Mathematica Balkanica 1 Archiv der Mathematik 1 Commentationes Mathematicae Universitatis Carolinae 1 International Journal of Mathematics and Mathematical Sciences 1 Real Analysis Exchange 1 Optimization 1 Annals of Operations Research 1 Aequationes Mathematicae 1 Mathematica 1 Journal of Mathematical Sciences (New York) 1 European Mathematical Society Newsletter 1 Analele Universității din Timișoara. Seria Matematică-Informatică 1 Abstract and Applied Analysis 1 Fixed Point Theory 1 Fixed Point Theory and Applications 1 Gazeta Matematică. Revistă de Cultură Matematică 1 Preprint. “Babeș-Bolyai” University. Faculty of Mathematics. Research Seminars 1 Lecture Notes in Mathematics 1 Advances in Operator Theory 1 Frontiers in Mathematics all top 5 Fields 45 Functional analysis (46-XX) 24 Approximations and expansions (41-XX) 17 General topology (54-XX) 14 Operator theory (47-XX) 5 Calculus of variations and optimal control; optimization (49-XX) 5 Global analysis, analysis on manifolds (58-XX) 4 Real functions (26-XX) 3 Operations research, mathematical programming (90-XX) 2 General and overarching topics; collections (00-XX) 2 Order, lattices, ordered algebraic structures (06-XX) 2 Measure and integration (28-XX) 2 Harmonic analysis on Euclidean spaces (42-XX) 1 History and biography (01-XX) 1 Topological groups, Lie groups (22-XX) 1 Functions of a complex variable (30-XX) 1 Probability theory and stochastic processes (60-XX) 1 Game theory, economics, finance, and other social and behavioral sciences (91-XX) Publications by Year all cited Publications top 5 cited Publications Citations contained in zbMATH Open 44 Publications have been cited 354 times in 256 Documents Cited by ▼ Year ▼ Functional analysis in asymmetric normed spaces. Zbl 1266.46001Cobzaş, Ştefan 89 2013 Completeness in quasi-metric spaces and Ekeland variational principle. Zbl 1217.54026Cobzaş, S. 31 2011 Lipschitz functions. Zbl 1431.26002Cobzaş, Ştefan; Miculescu, Radu; Nicolae, Adriana 25 2019 Separation of convex sets and best approximation in spaces with asymmetric norm. Zbl 1082.41024Cobzaş, S. 19 2004 Geometric properties of Banach spaces and the existence of nearest and farthest points. Zbl 1100.46005Cobzaş, Stefan 17 2005 Generic existence of solutions for some perturbed optimization problems. Zbl 0957.49014Cobzaş, S. 16 2000 Functional analysis in asymmetric normed spaces. Zbl 1296.46001Cobzaş, S. 15 2011 Variational principles, completeness and the existence of traps in behavioral sciences. Zbl 1476.91113Bao, T. Q.; Cobzaş, S.; Soubeyran, A. 15 2018 Non convex optimization problems on weakly compact subsets of Banach spaces. Zbl 0456.49008Cobzas, S. 9 1980 Ekeland variational principle in asymmetric locally convex spaces. Zbl 1251.46039Cobzaş, S. 8 2012 Asymmetric locally convex spaces. Zbl 1096.46002Cobzaş, S. 8 2005 Fixed points and completeness in metric and generalized metric spaces. Zbl 1451.54011Cobzaş, S. 8 2020 Condensation of singularities and divergence results in approximation theory. Zbl 0478.41030Cobzas, Stefan; Muntean, Ioan 7 1981 The completion of generalized b-metric spaces and fixed points. Zbl 1456.54012Cobzaş, Ştefan; Czerwik, Stefan 7 2020 Compact and precompact sets in asymmetric locally convex spaces. Zbl 1185.46001Cobzaş, S. 6 2009 Antiproximinal sets in some Banach spaces. Zbl 0311.41028Cobzas, S. 6 1974 Antiproximinal sets in Banach spaces of \(c_0\)-type. Zbl 0408.41017Cobzas, S. 6 1978 Antiproximinal sets in Banach spaces of continuous functions. Zbl 0407.46025Cobzas, S. 5 1976 Extension of bounded linear functionals and best approximation in spaces with asymmetric norm. Zbl 1228.41029Cobzaş, Stefan; Mustăţa, Costica 5 2004 Completeness with respect to the probabilistic Pompeiu-Hausdorff metric. Zbl 1164.46040Cobzaş, Ştefan 4 2007 Zabrejko’s lemma and the fundamental principles of functional analysis in the asymmetric case. Zbl 1322.46004Mabula, M. D.; Cobzaş, S. 4 2015 Norm-preserving extension of convex Lipschitz functions. Zbl 0405.41023Cobzas, S.; Mustata, C. 3 1978 A Mazur-Ulam theorem for probabilistic normed spaces. Zbl 1214.46055Cobzaş, Stefan 3 2009 Duality relations and characterizations of best approximation for p- convex sets. Zbl 0647.41023Cobzaş, Ştefan; Muntean, Ioan 3 1987 Fixed point theorems in locally convex spaces – the Schauder mapping method. Zbl 1103.47045Cobzaş, S. 3 2006 Free Abelian paratopological groups over metric spaces. Zbl 1307.22001Lin, Fucai; Liu, Chuan; Lin, Shou; Cobzas, Stefan 3 2015 Normal cones and Thompson metric. Zbl 1330.46007Cobzaş, Ştefan; Rus, Mircea-Dan 3 2014 Compact bilinear operators on asymmetric normed spaces. Zbl 1489.46052Cobzaş, S. 3 2022 Ekeland, Takahashi and Caristi principles in quasi-pseudometric spaces. Zbl 1423.58009Cobzaş, S. 3 2019 Continuous and locally Lipschitz convex functions. Zbl 0385.46029Cobzas, Stefan; Muntean, Ioan 2 1976 Compact operators on spaces with asymmetric norm. Zbl 1150.46312Cobzaş, Ş. 2 2006 Antiproximinal sets in the Banach space \(c( X)\). Zbl 0887.41029Cobzaş, S. 2 1997 Antiproximinal sets in Banach spaces. Zbl 1010.46015Cobzas, S. 2 1999 Lipschitz properties of convex functions. Zbl 1379.46056Cobzaş, Stefan 2 2017 Hahn decompositions of finitely additive measures. Zbl 0338.28004Cobzas, S. 1 1976 Support functionals of the unit ball in Banach spaces of bounded functions. Zbl 0744.46011Cobzaş, S. 1 1986 Some questions in the theory of Šerstnev random normed spaces. Zbl 1037.46066Cobzaş, Ştefan 1 2002 Best approximation in random normed spaces. Zbl 1073.46515Cobzaş, Stefan 1 2003 Lipschitz properties for families of convex mappings. Zbl 1079.46522Cobzaş, Ş. 1 2001 Antiproximinal sets in the Banach space \(C(\omega^k;X)\). Zbl 1075.46509Cobzaş, S. 1 1998 Compactness in spaces of Lipschitz functions. Zbl 1010.46027Cobzaş, Ştefan 1 2001 Mathematical analysis (Differential calculus). (Analiză matematică (Calculul diferenţial).) Zbl 0907.26001Cobzaş, Ştefan 1 1997 Best approximation in spaces with asymmetric norm. Zbl 1150.41353Cobzaş, S.; Mustăţa, C. 1 2006 Book review of: A. Kubzdela, Selected topics in non-Archimedean Banach spaces. Zbl 1403.00004Cobzaş, Stefan 1 2018 Compact bilinear operators on asymmetric normed spaces. Zbl 1489.46052Cobzaş, S. 3 2022 Fixed points and completeness in metric and generalized metric spaces. Zbl 1451.54011Cobzaş, S. 8 2020 The completion of generalized b-metric spaces and fixed points. Zbl 1456.54012Cobzaş, Ştefan; Czerwik, Stefan 7 2020 Lipschitz functions. Zbl 1431.26002Cobzaş, Ştefan; Miculescu, Radu; Nicolae, Adriana 25 2019 Ekeland, Takahashi and Caristi principles in quasi-pseudometric spaces. Zbl 1423.58009Cobzaş, S. 3 2019 Variational principles, completeness and the existence of traps in behavioral sciences. Zbl 1476.91113Bao, T. Q.; Cobzaş, S.; Soubeyran, A. 15 2018 Book review of: A. Kubzdela, Selected topics in non-Archimedean Banach spaces. Zbl 1403.00004Cobzaş, Stefan 1 2018 Lipschitz properties of convex functions. Zbl 1379.46056Cobzaş, Stefan 2 2017 Zabrejko’s lemma and the fundamental principles of functional analysis in the asymmetric case. Zbl 1322.46004Mabula, M. D.; Cobzaş, S. 4 2015 Free Abelian paratopological groups over metric spaces. Zbl 1307.22001Lin, Fucai; Liu, Chuan; Lin, Shou; Cobzas, Stefan 3 2015 Normal cones and Thompson metric. Zbl 1330.46007Cobzaş, Ştefan; Rus, Mircea-Dan 3 2014 Functional analysis in asymmetric normed spaces. Zbl 1266.46001Cobzaş, Ştefan 89 2013 Ekeland variational principle in asymmetric locally convex spaces. Zbl 1251.46039Cobzaş, S. 8 2012 Completeness in quasi-metric spaces and Ekeland variational principle. Zbl 1217.54026Cobzaş, S. 31 2011 Functional analysis in asymmetric normed spaces. Zbl 1296.46001Cobzaş, S. 15 2011 Compact and precompact sets in asymmetric locally convex spaces. Zbl 1185.46001Cobzaş, S. 6 2009 A Mazur-Ulam theorem for probabilistic normed spaces. Zbl 1214.46055Cobzaş, Stefan 3 2009 Completeness with respect to the probabilistic Pompeiu-Hausdorff metric. Zbl 1164.46040Cobzaş, Ştefan 4 2007 Fixed point theorems in locally convex spaces – the Schauder mapping method. Zbl 1103.47045Cobzaş, S. 3 2006 Compact operators on spaces with asymmetric norm. Zbl 1150.46312Cobzaş, Ş. 2 2006 Best approximation in spaces with asymmetric norm. Zbl 1150.41353Cobzaş, S.; Mustăţa, C. 1 2006 Geometric properties of Banach spaces and the existence of nearest and farthest points. Zbl 1100.46005Cobzaş, Stefan 17 2005 Asymmetric locally convex spaces. Zbl 1096.46002Cobzaş, S. 8 2005 Separation of convex sets and best approximation in spaces with asymmetric norm. Zbl 1082.41024Cobzaş, S. 19 2004 Extension of bounded linear functionals and best approximation in spaces with asymmetric norm. Zbl 1228.41029Cobzaş, Stefan; Mustăţa, Costica 5 2004 Best approximation in random normed spaces. Zbl 1073.46515Cobzaş, Stefan 1 2003 Some questions in the theory of Šerstnev random normed spaces. Zbl 1037.46066Cobzaş, Ştefan 1 2002 Lipschitz properties for families of convex mappings. Zbl 1079.46522Cobzaş, Ş. 1 2001 Compactness in spaces of Lipschitz functions. Zbl 1010.46027Cobzaş, Ştefan 1 2001 Generic existence of solutions for some perturbed optimization problems. Zbl 0957.49014Cobzaş, S. 16 2000 Antiproximinal sets in Banach spaces. Zbl 1010.46015Cobzas, S. 2 1999 Antiproximinal sets in the Banach space \(C(\omega^k;X)\). Zbl 1075.46509Cobzaş, S. 1 1998 Antiproximinal sets in the Banach space \(c( X)\). Zbl 0887.41029Cobzaş, S. 2 1997 Mathematical analysis (Differential calculus). (Analiză matematică (Calculul diferenţial).) Zbl 0907.26001Cobzaş, Ştefan 1 1997 Duality relations and characterizations of best approximation for p- convex sets. Zbl 0647.41023Cobzaş, Ştefan; Muntean, Ioan 3 1987 Support functionals of the unit ball in Banach spaces of bounded functions. Zbl 0744.46011Cobzaş, S. 1 1986 Condensation of singularities and divergence results in approximation theory. Zbl 0478.41030Cobzas, Stefan; Muntean, Ioan 7 1981 Non convex optimization problems on weakly compact subsets of Banach spaces. Zbl 0456.49008Cobzas, S. 9 1980 Antiproximinal sets in Banach spaces of \(c_0\)-type. Zbl 0408.41017Cobzas, S. 6 1978 Norm-preserving extension of convex Lipschitz functions. Zbl 0405.41023Cobzas, S.; Mustata, C. 3 1978 Antiproximinal sets in Banach spaces of continuous functions. Zbl 0407.46025Cobzas, S. 5 1976 Continuous and locally Lipschitz convex functions. Zbl 0385.46029Cobzas, Stefan; Muntean, Ioan 2 1976 Hahn decompositions of finitely additive measures. Zbl 0338.28004Cobzas, S. 1 1976 Antiproximinal sets in some Banach spaces. Zbl 0311.41028Cobzas, S. 6 1974 all cited Publications top 5 cited Publications all top 5 Cited by 335 Authors 14 Cobzaş, Ştefan 13 Tsar’kov, Igor’ Germanovich 11 Künzi, Hans-Peter A. 11 Soubeyran, Antoine 9 Alegre, Carmen 9 Alimov, Alexey R. 9 Sánchez-Pérez, Enrique Alfonso 8 Olela Otafudu, Olivier 8 Romaguera Bonilla, Salvador 7 Altun, Ishak 7 Karapınar, Erdal 7 Li, Chong 5 Yildiz, Filiz 4 Jonard-Pérez, Natalia 4 Petitjean, Colin 4 Zaslavski, Alexander Yakovlevich 3 Abbas, Said 3 Agyingi, Collins Amburo 3 Bachir, Mohammed 3 Beer, Gerald Alan 3 Benchohra, Mouffak 3 Cai, Zhangyong Cai 3 Hai, Le Phuoc 3 He, Fei 3 Jahn, Thomas 3 Lin, Shou 3 Mabula, M. D. 3 Mitrea, Alexandru-Ioan 3 Peng, Lihui 3 Procházka, Antonín 3 Trif, Tiberiu 3 Truong Quang Bao 3 Xiao, Jianzhong 3 Zhu, Xinghua 2 Abbas, Mujahid 2 Agarwal, Ravi P. 2 Akkouchi, Mohamed 2 Arshad, Muhammad 2 Balaganskij, V. S. 2 Breckner, Wolfgang W. 2 Chaira, Karim 2 Conradie, J. J. 2 Conradie, Jurie 2 Dağ, Hacer 2 Daniilidis, Aris 2 Dudov, Sergeĭ Ivanovich 2 Espínola García, Rafael 2 Fonf, Vladimir P. 2 Fukuoka, Ryuichi 2 García-Lirola, Luis Carlos 2 García-Raffi, Luis M. 2 Garrido, María Isabel 2 İlkhan, Merve 2 Javanshir, Nezakat 2 Kara, Emrah Evren 2 Kirk, William Arthur 2 Krim, Salim 2 Lin, Fucai 2 Liu, Chuan 2 Luo, Xianfa 2 Maćkowiak, Piotr 2 Marín, Josefa 2 Mordukhovich, Boris S. 2 Nguyen Van Dung 2 Novo-Sanjurjo, Vicente 2 Petruşel, Adrian 2 Phan Quôc Khánh 2 Qiu, Jinghui 2 Richter, Christian 2 Rus, Ioan A. 2 Sadarangani, Kishin B. 2 Shoaib, Abdullah 2 Şimşek, Hakan 2 Stonyakin, Fedor Sergeevich 2 Tirado, Pedro 2 Valero, Oscar 2 Varga, Csaba György 2 Venegas M., Francisco 2 Yao, Jen-Chih 1 Aamri, Mohammed 1 Abbar, Arafat 1 Abramova, Veronika Valer’evna 1 Acar, Özlem 1 Aggarwal, Manisha 1 Ait Mansour, Mohamed 1 Al-Homidan, Suliman S. 1 Alaca, Cihangir 1 Alfaqih, Waleed Mohd. 1 Alfuraidan, Monther Rashed 1 Ali, Basit 1 Aliaga, Ramón J. 1 Aneja, Surbhi 1 Anjum, Rizwan 1 Ansari, Qamrul Hasan 1 Bahraoui, Mohamed Amin 1 Bandyopadhyay, Pradipta 1 Basso, Giuliano 1 Bednov, Borislav Borisovich 1 Ben Gharbia, Ibtihel 1 Berinde, Vasile ...and 235 more Authors all top 5 Cited in 111 Serials 32 Topology and its Applications 18 Journal of Mathematical Analysis and Applications 12 Mathematical Notes 7 Journal of Optimization Theory and Applications 7 Optimization 7 Journal of Convex Analysis 7 Journal of Fixed Point Theory and Applications 6 Nonlinear Analysis. Theory, Methods & Applications. Series A: Theory and Methods 6 Results in Mathematics 6 Journal of Global Optimization 6 Fixed Point Theory and Applications 5 Quaestiones Mathematicae 5 Abstract and Applied Analysis 5 Set-Valued and Variational Analysis 5 Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A: Matemáticas. RACSAM 4 Fuzzy Sets and Systems 3 Studia Mathematica 3 Journal of Approximation Theory 3 Acta Mathematica Hungarica 2 Archiv der Mathematik 2 Demonstratio Mathematica 2 Numerical Functional Analysis and Optimization 2 Annals of Operations Research 2 Topological Methods in Nonlinear Analysis 2 Russian Journal of Mathematical Physics 2 Journal of Mathematical Sciences (New York) 2 Filomat 2 Bulletin of the Malaysian Mathematical Sciences Society. Second Series 2 Fixed Point Theory 2 Mediterranean Journal of Mathematics 2 Journal of Nonlinear Science and Applications 2 Mathematical Sciences 2 Journal of Mathematics 2 Journal of Function Spaces 1 Analysis Mathematica 1 Bulletin of the Australian Mathematical Society 1 Moscow University Mathematics Bulletin 1 Rocky Mountain Journal of Mathematics 1 Chaos, Solitons and Fractals 1 Advances in Mathematics 1 Annali di Matematica Pura ed Applicata. Serie Quarta 1 Annales Universitatis Mariae Curie-Skłodowska. Sectio A. Mathematica 1 Applied Mathematics and Computation 1 Calcolo 1 Colloquium Mathematicum 1 Fasciculi Mathematici 1 Geometriae Dedicata 1 Journal of Differential Equations 1 Journal of Econometrics 1 Journal of Functional Analysis 1 Journal of Multivariate Analysis 1 Journal of Pure and Applied Algebra 1 Manuscripta Mathematica 1 Mathematics and Computers in Simulation 1 Monatshefte für Mathematik 1 Proceedings of the American Mathematical Society 1 SIAM Journal on Control and Optimization 1 Siberian Mathematical Journal 1 Transactions of the American Mathematical Society 1 Acta Applicandae Mathematicae 1 International Journal of Approximate Reasoning 1 Mathematical and Computer Modelling 1 Machine Learning 1 Aequationes Mathematicae 1 L’Enseignement Mathématique. 2e Série 1 Proceedings of the Royal Society of Edinburgh. Section A. Mathematics 1 Mathematical Programming. Series A. Series B 1 Russian Mathematics 1 The Journal of Analysis 1 Applied Categorical Structures 1 Calculus of Variations and Partial Differential Equations 1 Electronic Journal of Probability 1 Izvestiya: Mathematics 1 European Series in Applied and Industrial Mathematics (ESAIM): Control, Optimization and Calculus of Variations 1 Taiwanese Journal of Mathematics 1 Journal of Inequalities and Applications 1 Infinite Dimensional Analysis, Quantum Probability and Related Topics 1 Mathematica Moravica 1 Discrete Dynamics in Nature and Society 1 Communications de la Faculté des Sciences de l’Université d’Ankara. Séries A1. Mathematics and Statistics 1 Analysis (München) 1 Communications in Nonlinear Science and Numerical Simulation 1 Qualitative Theory of Dynamical Systems 1 Nonlinear Analysis. Modelling and Control 1 Applied Mathematics E-Notes 1 Hacettepe Journal of Mathematics and Statistics 1 Journal of Function Spaces and Applications 1 Advances in Difference Equations 1 Journal of Industrial and Management Optimization 1 Proyecciones 1 Proceedings of the Steklov Institute of Mathematics 1 Complex Analysis and Operator Theory 1 Optimization Letters 1 Journal of Physics A: Mathematical and Theoretical 1 JP Journal of Fixed Point Theory and Applications 1 Transactions of National Academy of Sciences of Azerbaijan. Series of Physical-Technical and Mathematical Sciences 1 Analele Universității de Vest din Timișoara. Seria Matematică-Informatică 1 Asian-European Journal of Mathematics 1 Journal of Topology and Analysis 1 Applied General Topology ...and 11 more Serials all top 5 Cited in 38 Fields 114 General topology (54-XX) 100 Functional analysis (46-XX) 58 Operator theory (47-XX) 40 Approximations and expansions (41-XX) 37 Calculus of variations and optimal control; optimization (49-XX) 34 Operations research, mathematical programming (90-XX) 20 Real functions (26-XX) 15 Convex and discrete geometry (52-XX) 15 Global analysis, analysis on manifolds (58-XX) 10 Measure and integration (28-XX) 7 Differential geometry (53-XX) 7 Game theory, economics, finance, and other social and behavioral sciences (91-XX) 6 Ordinary differential equations (34-XX) 6 Geometry (51-XX) 6 Numerical analysis (65-XX) 5 Topological groups, Lie groups (22-XX) 4 Combinatorics (05-XX) 3 Order, lattices, ordered algebraic structures (06-XX) 3 Dynamical systems and ergodic theory (37-XX) 3 Integral equations (45-XX) 3 Statistics (62-XX) 3 Computer science (68-XX) 2 Partial differential equations (35-XX) 2 Probability theory and stochastic processes (60-XX) 2 Systems theory; control (93-XX) 1 History and biography (01-XX) 1 Mathematical logic and foundations (03-XX) 1 Algebraic geometry (14-XX) 1 Functions of a complex variable (30-XX) 1 Potential theory (31-XX) 1 Several complex variables and analytic spaces (32-XX) 1 Difference and functional equations (39-XX) 1 Sequences, series, summability (40-XX) 1 Harmonic analysis on Euclidean spaces (42-XX) 1 Integral transforms, operational calculus (44-XX) 1 Manifolds and cell complexes (57-XX) 1 Fluid mechanics (76-XX) 1 Quantum theory (81-XX) Citations by Year