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Badea, Catalin

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Author ID: badea.catalin Recent zbMATH articles by "Badea, Catalin"
Published as: Badea, Catalin; Badea, C.; Badea, Cătălin
Documents Indexed: 68 Publications since 1985, including 1 Book
Reviewing Activity: 370 Reviews
all top 5

Serials

3 Studia Mathematica
3 Journal of Functional Analysis
3 Journal of Operator Theory
2 Journal of Mathematical Analysis and Applications
2 Advances in Mathematics
2 Canadian Mathematical Bulletin
2 Journal of Approximation Theory
2 Mathématica – Revue d’Analyse Numérique et de Théorie de l’Approximation. L’Analyse Numérique et la Théorie de l’Approximation
2 Comptes Rendus. Mathématique. Académie des Sciences, Paris
2 Preprint. “Babeş-Bolyai” University. Faculty of Mathematics and Physics. Research Seminars
1 Bulletin of the Australian Mathematical Society
1 Computers & Mathematics with Applications
1 Israel Journal of Mathematics
1 Journal d’Analyse Mathématique
1 Periodica Mathematica Hungarica
1 Acta Arithmetica
1 Acta Scientiarum Mathematicarum
1 Analele Ştiinţifice ale Universităţii Al. I. Cuza din Iaşi. (Serie Nouă.) Secţiunea Ia. Matematică-Informatică
1 Archiv der Mathematik
1 Archivum Mathematicum
1 Bulletin of the London Mathematical Society
1 Commentarii Mathematici Helvetici
1 Glasgow Mathematical Journal
1 Indiana University Mathematics Journal
1 Integral Equations and Operator Theory
1 Mathematische Nachrichten
1 Mathematische Zeitschrift
1 Proceedings of the American Mathematical Society
1 Real Analysis Exchange
1 Results in Mathematics
1 Transactions of the American Mathematical Society
1 Topology and its Applications
1 Ergodic Theory and Dynamical Systems
1 Approximation Theory and its Applications
1 Revista Matemática Iberoamericana
1 IMRN. International Mathematics Research Notices
1 Studia Universitatis Babeş-Bolyai. Mathematica
1 Comptes Rendus de l’Académie des Sciences. Série I
1 Indagationes Mathematicae. New Series
1 Revue d’Analyse Numérique et de Théorie de l’Approximation
1 St. Petersburg Mathematical Journal
1 Nonlinear Functional Analysis and Applications
1 Communications on Pure and Applied Analysis
1 Mediterranean Journal of Mathematics
1 Preprint. “Babeş-Bolyai” University. Faculty of Mathematics. Research Seminars
1 Journal of Applied Functional Analysis
1 Theta Series in Advanced Mathematics
1 Operators and Matrices
1 Pure and Applied Functional Analysis

Publications by Year

Citations contained in zbMATH Open

50 Publications have been cited 307 times in 178 Documents Cited by Year
A test function theorem and approximation by pseudopolynomials. Zbl 0595.41017
Badea, C.; Badea, I.; Gonska, Heinz H.
28
1986
Notes on degree of approximation of B-continuous and B-differentiable functions. Zbl 0671.41013
Badea, C.; Badea, I.; Cottin, C.; Gonska, Heinz H.
27
1988
Korovkin-type theorems for generalized Boolean sum operators. Zbl 0765.41020
Badea, C.; Cottin, C.
23
1991
Unimodular eigenvalues, uniformly distributed sequences and linear dynamics. Zbl 1123.47006
Badea, Catalin; Grivaux, Sophie
23
2007
The irrationality of certain infinite series. Zbl 0629.10027
Badea, C.
16
1987
The rate of convergence in the method of alternating projections. Zbl 1294.47026
Badea, C.; Grivaux, S.; Müller, V.
15
2012
Grüss’ inequality for positive linear functionals. Zbl 0619.26011
Andrica, D.; Badea, C.
13
1988
\(K\)-functionals and moduli of smoothness of functions defined on compact metric spaces. Zbl 0836.46065
Badea, C.
11
1995
Bernstein polynomials and operator theory. Zbl 1198.47028
Badea, Catalin
9
2009
The stable rank of topological algebras and a problem of R. G. Swan. Zbl 0921.46053
Badea, C.
9
1998
Convex domains and K-spectral sets. Zbl 1084.47004
Badea, Catalin; Crouzeix, Michel; Delyon, Bernard
9
2006
Geometric, spectral and asymptotic properties of averaged products of projections in Banach spaces. Zbl 1215.47004
Badea, Catalin; Lyubich, Yuri I.
9
2010
Intersections of several disks of the Riemann sphere as \(K\)-spectral sets. Zbl 1169.47008
Badea, Catalin; Beckermann, Bernhard; Crouzeix, Michel
8
2009
Multiples of hypercyclic operators. Zbl 1168.47007
Badea, Catalin; Grivaux, Sophie; Müller, Vladimir
7
2009
The Cauchy dual and 2-isometric liftings of concave operators. Zbl 1435.47017
Badea, Catalin; Suciu, Laurian
7
2019
A theorem on irrationality of infinite series and applications. Zbl 0770.11036
Badea, C.
7
1993
A generalization of the Friedrichs angle and the method of alternating projections. Zbl 1191.46021
Badea, Catalin; Grivaux, Sophie; Müller, Vladimir
6
2010
Operators similar to partial isometries. Zbl 1122.47001
Badea, C.; Mbekhta, M.
6
2005
Schur multipliers and operator-valued Foguel-Hankel operators. Zbl 1031.47019
Badea, C.; Paulsen, V. I.
5
2001
Constrained von Neumann inequalities. Zbl 1049.47004
Badea, C.; Cassier, G.
5
2002
Size of the peripheral point spectrum under power or resolvent growth conditions. Zbl 1126.47001
Badea, Catalin; Grivaux, Sophie
5
2007
Ritt operators and convergence in the method of alternating projections. Zbl 1336.41013
Badea, Catalin; Seifert, David
4
2016
On the Hyers-Ulam stability of mappings: The direct method. Zbl 0845.39011
Badea, Catalin
4
1994
The general linear equation is stable. Zbl 1076.39023
Badea, Catalin
4
2005
Perturbations of operators similar to contractions and the commutator equation. Zbl 1015.47011
Badea, C.
4
2002
Epsilon-hypercyclic operators. Zbl 1206.47009
Badea, Catalin; Grivaux, Sophie; Müller, Vladimir
4
2010
Jensen’s and Jessen’s inequality, convexity-preserving and approximating polynomial operators and Korovkin’s theorem. Zbl 0681.26008
Andrica, Dorin; Badea, Cătălin
3
1986
Growth conditions and inverse producing extensions. Zbl 1122.47007
Badea, Cătălin; Müller, Vladimír
3
2005
Kazhdan sets in groups and equidistribution properties. Zbl 1369.22004
Badea, Catalin; Grivaux, Sophie
3
2017
On weak orbits of operators. Zbl 1204.47001
Badea, C.; Müller, V.
2
2009
Compressions of resolvents and maximal radius of regularity. Zbl 0919.47003
Badea, C.; Mbekhta, M.
2
1999
Operators near completely polynomially dominated ones and similarity problems. Zbl 1019.47010
Badea, C.
2
2003
On the order of simultaneous approximation of bivariate functions by Bernstein operators. Zbl 0638.41018
Badea, Ion; Badea, Cătălin
2
1987
Generalized inverses and the maximal radius of regularity of a Fredholm operator. Zbl 0897.47001
Badea, Catalin; Mbekhta, Mostafa
2
1997
The Gleason-Kahane-Zelazko theorem and Ransford’s generalized spectra. Zbl 0739.46035
Badea, Catalin
2
1991
Faber-hypercyclic operators. Zbl 1156.47008
Badea, Catalin; Grivaux, Sophie
2
2008
Sets of integers determined by operator-theoretical properties: Jamison and Kazhdan sets in the group \(\mathbb{Z}\). Zbl 1412.22013
Badea, Catalin; Grivaux, Sophie
2
2017
Spectral sets and operator radii. Zbl 07000659
Badea, Catalin; Crouzeix, Michel; Klaja, Hubert
2
2018
Inverse of Čebyšev’s inequality. Zbl 0757.26019
Andrica, D.; Badea, C.
1
1985
Bögel functions, tensor products and blending approximation. Zbl 0830.41027
Badea, C.; Cottin, C.; Gonska, Heinz H.
1
1995
On existence of one-sided and generalized resolvents of bounded linear operators. Zbl 0946.47002
Badea, C.; Mbekhta, M.
1
1998
The Gleason-Kahane-Zelazko property and Korovkin systems in symmetric involutive Banach algebras. Zbl 0781.46040
Badea, C.; Rasa, I.
1
1993
The Gleason-Kahane-Zelazko theorem. Zbl 0824.46054
Badea, C.
1
1994
A Korovkin-type theorem for generalizations of Boolean sum operators and approximation by trigonometric pseudopolynomials. Zbl 0671.42003
Badea, C.; Badea, I.; Cottin, C.
1
1988
Similarity problems, Følner sets and isometric representations of amenable semigroups. Zbl 07037521
Badea, Catalin; Suciu, Laurian
1
2019
Subalgebras with the same \(K\)-theory and the same stable rank. Zbl 0832.46062
Badea, C.
1
1994
Subscalar operators and growth of resolvent. Zbl 1122.47033
Badea, Cătălin; Müller, Vladimír
1
2006
Classes of contractions and Harnack domination. Zbl 1459.47007
Badea, Catalin; Suciu, Laurian; Timotin, Dan
1
2017
Kazhdan constants, continuous probability measures with large Fourier coefficients and rigidity sequences. Zbl 1451.43001
Badea, Catalin; Grivaux, Sophie
1
2020
Quantified asymptotic behaviour of Banach space operators and applications to iterative projection methods. Zbl 07296488
Badea, Catalin; Seifert, David
1
2017
Kazhdan constants, continuous probability measures with large Fourier coefficients and rigidity sequences. Zbl 1451.43001
Badea, Catalin; Grivaux, Sophie
1
2020
The Cauchy dual and 2-isometric liftings of concave operators. Zbl 1435.47017
Badea, Catalin; Suciu, Laurian
7
2019
Similarity problems, Følner sets and isometric representations of amenable semigroups. Zbl 07037521
Badea, Catalin; Suciu, Laurian
1
2019
Spectral sets and operator radii. Zbl 07000659
Badea, Catalin; Crouzeix, Michel; Klaja, Hubert
2
2018
Kazhdan sets in groups and equidistribution properties. Zbl 1369.22004
Badea, Catalin; Grivaux, Sophie
3
2017
Sets of integers determined by operator-theoretical properties: Jamison and Kazhdan sets in the group \(\mathbb{Z}\). Zbl 1412.22013
Badea, Catalin; Grivaux, Sophie
2
2017
Classes of contractions and Harnack domination. Zbl 1459.47007
Badea, Catalin; Suciu, Laurian; Timotin, Dan
1
2017
Quantified asymptotic behaviour of Banach space operators and applications to iterative projection methods. Zbl 07296488
Badea, Catalin; Seifert, David
1
2017
Ritt operators and convergence in the method of alternating projections. Zbl 1336.41013
Badea, Catalin; Seifert, David
4
2016
The rate of convergence in the method of alternating projections. Zbl 1294.47026
Badea, C.; Grivaux, S.; Müller, V.
15
2012
Geometric, spectral and asymptotic properties of averaged products of projections in Banach spaces. Zbl 1215.47004
Badea, Catalin; Lyubich, Yuri I.
9
2010
A generalization of the Friedrichs angle and the method of alternating projections. Zbl 1191.46021
Badea, Catalin; Grivaux, Sophie; Müller, Vladimir
6
2010
Epsilon-hypercyclic operators. Zbl 1206.47009
Badea, Catalin; Grivaux, Sophie; Müller, Vladimir
4
2010
Bernstein polynomials and operator theory. Zbl 1198.47028
Badea, Catalin
9
2009
Intersections of several disks of the Riemann sphere as \(K\)-spectral sets. Zbl 1169.47008
Badea, Catalin; Beckermann, Bernhard; Crouzeix, Michel
8
2009
Multiples of hypercyclic operators. Zbl 1168.47007
Badea, Catalin; Grivaux, Sophie; Müller, Vladimir
7
2009
On weak orbits of operators. Zbl 1204.47001
Badea, C.; Müller, V.
2
2009
Faber-hypercyclic operators. Zbl 1156.47008
Badea, Catalin; Grivaux, Sophie
2
2008
Unimodular eigenvalues, uniformly distributed sequences and linear dynamics. Zbl 1123.47006
Badea, Catalin; Grivaux, Sophie
23
2007
Size of the peripheral point spectrum under power or resolvent growth conditions. Zbl 1126.47001
Badea, Catalin; Grivaux, Sophie
5
2007
Convex domains and K-spectral sets. Zbl 1084.47004
Badea, Catalin; Crouzeix, Michel; Delyon, Bernard
9
2006
Subscalar operators and growth of resolvent. Zbl 1122.47033
Badea, Cătălin; Müller, Vladimír
1
2006
Operators similar to partial isometries. Zbl 1122.47001
Badea, C.; Mbekhta, M.
6
2005
The general linear equation is stable. Zbl 1076.39023
Badea, Catalin
4
2005
Growth conditions and inverse producing extensions. Zbl 1122.47007
Badea, Cătălin; Müller, Vladimír
3
2005
Operators near completely polynomially dominated ones and similarity problems. Zbl 1019.47010
Badea, C.
2
2003
Constrained von Neumann inequalities. Zbl 1049.47004
Badea, C.; Cassier, G.
5
2002
Perturbations of operators similar to contractions and the commutator equation. Zbl 1015.47011
Badea, C.
4
2002
Schur multipliers and operator-valued Foguel-Hankel operators. Zbl 1031.47019
Badea, C.; Paulsen, V. I.
5
2001
Compressions of resolvents and maximal radius of regularity. Zbl 0919.47003
Badea, C.; Mbekhta, M.
2
1999
The stable rank of topological algebras and a problem of R. G. Swan. Zbl 0921.46053
Badea, C.
9
1998
On existence of one-sided and generalized resolvents of bounded linear operators. Zbl 0946.47002
Badea, C.; Mbekhta, M.
1
1998
Generalized inverses and the maximal radius of regularity of a Fredholm operator. Zbl 0897.47001
Badea, Catalin; Mbekhta, Mostafa
2
1997
\(K\)-functionals and moduli of smoothness of functions defined on compact metric spaces. Zbl 0836.46065
Badea, C.
11
1995
Bögel functions, tensor products and blending approximation. Zbl 0830.41027
Badea, C.; Cottin, C.; Gonska, Heinz H.
1
1995
On the Hyers-Ulam stability of mappings: The direct method. Zbl 0845.39011
Badea, Catalin
4
1994
The Gleason-Kahane-Zelazko theorem. Zbl 0824.46054
Badea, C.
1
1994
Subalgebras with the same \(K\)-theory and the same stable rank. Zbl 0832.46062
Badea, C.
1
1994
A theorem on irrationality of infinite series and applications. Zbl 0770.11036
Badea, C.
7
1993
The Gleason-Kahane-Zelazko property and Korovkin systems in symmetric involutive Banach algebras. Zbl 0781.46040
Badea, C.; Rasa, I.
1
1993
Korovkin-type theorems for generalized Boolean sum operators. Zbl 0765.41020
Badea, C.; Cottin, C.
23
1991
The Gleason-Kahane-Zelazko theorem and Ransford’s generalized spectra. Zbl 0739.46035
Badea, Catalin
2
1991
Notes on degree of approximation of B-continuous and B-differentiable functions. Zbl 0671.41013
Badea, C.; Badea, I.; Cottin, C.; Gonska, Heinz H.
27
1988
Grüss’ inequality for positive linear functionals. Zbl 0619.26011
Andrica, D.; Badea, C.
13
1988
A Korovkin-type theorem for generalizations of Boolean sum operators and approximation by trigonometric pseudopolynomials. Zbl 0671.42003
Badea, C.; Badea, I.; Cottin, C.
1
1988
The irrationality of certain infinite series. Zbl 0629.10027
Badea, C.
16
1987
On the order of simultaneous approximation of bivariate functions by Bernstein operators. Zbl 0638.41018
Badea, Ion; Badea, Cătălin
2
1987
A test function theorem and approximation by pseudopolynomials. Zbl 0595.41017
Badea, C.; Badea, I.; Gonska, Heinz H.
28
1986
Jensen’s and Jessen’s inequality, convexity-preserving and approximating polynomial operators and Korovkin’s theorem. Zbl 0681.26008
Andrica, Dorin; Badea, Cătălin
3
1986
Inverse of Čebyšev’s inequality. Zbl 0757.26019
Andrica, D.; Badea, C.
1
1985
all top 5

Cited by 206 Authors

16 Agrawal, Purshottam Narain
15 Badea, Catalin
10 Grivaux, Sophie
9 İspir, Nurhayat
9 Peris, Alfredo
7 Acu, Ana Maria
7 Mbekhta, Mostafa
7 Suciu, Laurian
6 Müller, Vladimír
6 Reich, Simeon
5 Baxhaku, Behar
5 Kajla, Arun
4 Bès, Juan P.
4 Muraru, Carmen Violeta
4 Seifert, David
4 Sidharth, Manjari
4 Yin, Zongbin
3 Chen, Yuming
3 Demirci, Kamil
3 Doğru, Ogün
3 Dragomir, Sever Silvestru
3 Majdak, Witold
3 Menet, Quentin
3 Murillo-Arcila, Marina
3 Pustylnik, Evgeniy
3 Rasa, Ioan
3 Souroujon, Diko M.
3 Zapryanova, Teodora Dimova
2 Aiemsomboon, Laddawan
2 Anastassiou, George Angelos
2 Andrica, Dorin
2 Bărbosu, Dan
2 Bargetz, Christian
2 Bartoll, Salud
2 Bayart, Frédéric
2 Bickel, Kelly
2 Chauhan, Ruchi
2 Chavan, Sameer Laxman
2 Conejero, José Alberto
2 Crouzeix, Michel
2 Dirik, Fadime
2 Dritschel, Michael A.
2 Ezzahraoui, Hamid
2 Feshchenko, Ivan S.
2 Garg, Tarul
2 Gavrea, Ioan
2 Gorkin, Pamela B.
2 Greenbaum, Anne
2 He, Shengnan
2 Ivan, Mircea Dumitru
2 Jabłoński, Zenon Jan
2 Kumar, Dharmendra
2 Luo, Lvlin
2 Martínez-Giménez, Félix
2 Milovanović, Emina I.
2 Milovanović, Igor Ž.
2 Nagler, Johannes
2 Ng, Abraham C. S.
2 Oppenheim, Izhar
2 Puig, Yunied
2 Ransford, Thomas J.
2 Schwenninger, Felix L.
2 Sintunavarat, Wutiphol
2 Stochel, Jan
2 Yakubovich, Dmitry V.
2 Zalas, Rafał
2 Zaslavski, Alexander Yakovlevich
2 Zerouali, El Hassan
1 Acar, Tuncer
1 Alhevaz, Abdollah
1 Aliaga, Edmond
1 Anand, Akash
1 Andersson, Fredrik K.
1 Araci, Serkan
1 Arias, M. Laura
1 Aslan, Reşat
1 Badea, Eugen A.
1 Baghipur, Maryam
1 Bamerni, Nareen
1 Beckermann, Bernhard
1 Begen, Selin
1 Bërdëllima, Arian
1 Bermúdez, Teresa
1 Bonilla, Antonio
1 Borodin, Petr A.
1 Boshernitzan, Michael D.
1 Bruneau, Laurent
1 Canatan, Reyhan
1 Carlsson, Marcus
1 Cerejeiras, Paula
1 Chatterji, Indira
1 Chen, Zhijing
1 Ciurdariu, Loredana
1 Cohen, Guy
1 Costakis, George
1 Cottin, Claudia
1 Cuny, Christophe
1 Darwin, Oscar
1 Dayan, Yiftach
1 Devinck, Vincent
...and 106 more Authors
all top 5

Cited in 83 Serials

16 Journal of Mathematical Analysis and Applications
10 Journal of Functional Analysis
10 Results in Mathematics
8 Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A: Matemáticas. RACSAM
7 Journal of Approximation Theory
7 Linear Algebra and its Applications
5 Israel Journal of Mathematics
4 Applied Mathematics and Computation
4 Archiv der Mathematik
3 Integral Equations and Operator Theory
3 Transactions of the American Mathematical Society
3 SIAM Journal on Matrix Analysis and Applications
3 Journal of Inequalities and Applications
3 Comptes Rendus. Mathématique. Académie des Sciences, Paris
2 Computers & Mathematics with Applications
2 Journal d’Analyse Mathématique
2 Periodica Mathematica Hungarica
2 Studia Mathematica
2 Mathematische Annalen
2 Numerical Functional Analysis and Optimization
2 Proceedings of the American Mathematical Society
2 Quaestiones Mathematicae
2 Indagationes Mathematicae. New Series
2 International Journal of Bifurcation and Chaos in Applied Sciences and Engineering
2 Turkish Journal of Mathematics
2 Abstract and Applied Analysis
2 Computational Methods and Function Theory
2 Mediterranean Journal of Mathematics
2 Complex Analysis and Operator Theory
2 Asian-European Journal of Mathematics
2 Annals of Functional Analysis
2 Journal of Function Spaces
1 Discrete Applied Mathematics
1 Journal of Statistical Physics
1 Mathematical Methods in the Applied Sciences
1 Ukrainian Mathematical Journal
1 Annali di Matematica Pura ed Applicata. Serie Quarta
1 Automatica
1 Canadian Mathematical Bulletin
1 Commentarii Mathematici Helvetici
1 Czechoslovak Mathematical Journal
1 Fasciculi Mathematici
1 Journal of Differential Equations
1 Matematički Vesnik
1 Mathematica Slovaca
1 Mathematische Zeitschrift
1 Memoirs of the American Mathematical Society
1 Numerische Mathematik
1 Semigroup Forum
1 Topology and its Applications
1 Ergodic Theory and Dynamical Systems
1 Acta Mathematica Hungarica
1 Journal of Complexity
1 Constructive Approximation
1 Revista Matemática Iberoamericana
1 COMPEL
1 Applied Mathematics Letters
1 Mathematical and Computer Modelling
1 Numerical Algorithms
1 Aequationes Mathematicae
1 Expositiones Mathematicae
1 The Journal of Analysis
1 St. Petersburg Mathematical Journal
1 Filomat
1 Documenta Mathematica
1 Mathematical Communications
1 Honam Mathematical Journal
1 Positivity
1 Journal of Evolution Equations
1 Central European Journal of Mathematics
1 Vladikavkazskiĭ Matematicheskiĭ Zhurnal
1 Journal of Fixed Point Theory and Applications
1 Journal of Mathematical Inequalities
1 European Journal of Pure and Applied Mathematics
1 Banach Journal of Mathematical Analysis
1 Journal of Nonlinear Science and Applications
1 Analysis and Mathematical Physics
1 Carpathian Mathematical Publications
1 Concrete Operators
1 Open Mathematics
1 Advances in Operator Theory
1 Bollettino dell’Unione Matematica Italiana
1 Constructive Mathematical Analysis

Citations by Year