## Sikorska, Justyna

Compute Distance To:
 Author ID: sikorska.justyna Published as: Sikorska, Justyna; Sikorska, J.
 Documents Indexed: 39 Publications since 1995, including 1 Book 1 Contribution as Editor Co-Authors: 16 Co-Authors with 21 Joint Publications 334 Co-Co-Authors
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### Co-Authors

 19 single-authored 4 Bahyrycz, Anna 4 Fechner, Włodzimierz 3 Alsina, Claudi 3 Brzdęk, Janusz 3 Szostok, Tomasz 2 Ger, Roman 2 Kominek, Zygfryd 1 Chmieliński, Jacek 1 Forti, Gian Luigi 1 Łukasik, Radosław 1 Moslehian, Mohammad Sal 1 Piszczek, Magdalena 1 Sablik, Maciej 1 Santos Tomás, Maria 1 Tomás, M. Santos 1 Wójcik, Paweł
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### Serials

 7 Aequationes Mathematicae 6 Results in Mathematics 4 Nonlinear Analysis. Theory, Methods & Applications. Series A: Theory and Methods 3 Journal of Mathematical Analysis and Applications 3 Journal of Geometry 2 Demonstratio Mathematica 2 Bulletin of the Polish Academy of Sciences, Mathematics 2 Set-Valued and Variational Analysis 1 Annales Societatis Mathematicae Polonae. Seria I. Commentationes Mathematicae 1 Acta Mathematica Hungarica 1 Prace Naukowe Uniwersytetu Śląskiego w Katowicach. Annales Mathematicae Silesianae 1 Applied Mathematics Letters 1 Mathematica Pannonica 1 Journal of Inequalities and Applications 1 Mathematical Inequalities & Applications 1 Journal of Function Spaces and Applications 1 Banach Journal of Mathematical Analysis
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### Fields

 38 Difference and functional equations (39-XX) 7 Functional analysis (46-XX) 4 General topology (54-XX) 3 Operator theory (47-XX) 3 Geometry (51-XX) 2 Real functions (26-XX) 1 General and overarching topics; collections (00-XX) 1 Linear and multilinear algebra; matrix theory (15-XX) 1 Approximations and expansions (41-XX)

### Citations contained in zbMATH Open

34 Publications have been cited 344 times in 205 Documents Cited by Year
Recent developments of the conditional stability of the homomorphism equation. Zbl 1312.39031
Brzdęk, Janusz; Fechner, Włodzimierz; Moslehian, Mohammad Sal; Sikorska, Justyna
2015
Norm derivatives and characterizations of inner product spaces. Zbl 1196.46001
Alsina, Claudi; Sikorska, Justyna; Tomás, M. Santos
2010
On a direct method for proving the Hyers-Ulam stability of functional equations. Zbl 1198.39039
Sikorska, Justyna
2010
Stability of the orthogonal additivity. Zbl 0833.39007
Ger, Roman; Sikorska, Justyna
1995
A conditional exponential functional equation and its stability. Zbl 1187.39032
Brzdȩk, Janusz; Sikorska, Justyna
2010
On the Cauchy equation on spheres. Zbl 0894.39009
Ger, Roman; Sikorska, Justyna
1997
On two conditional Pexider functional equations and their stabilities. Zbl 1162.39018
Sikorska, Justyna
2009
Variations on the Drygas equation and its stability. Zbl 1201.39023
Forti, Gian-Luigi; Sikorska, Justyna
2011
Orthogonalities and functional equations. Zbl 1316.39008
Sikorska, Justyna
2015
On the stability of additivity. Zbl 1197.39016
Fechner, Włodzimierz; Sikorska, Justyna
2010
Exponential functional equation on spheres. Zbl 1205.39032
Sikorska, Justyna
2010
On a Pexiderized conditional exponential functional equation. Zbl 1212.39039
Sikorska, J.
2009
Hyperstability of the Fréchet equation and a characterization of inner product spaces. Zbl 1287.39017
Bahyrycz, Anna; Brzdȩk, Janusz; Piszczek, Magdalena; Sikorska, Justyna
2013
Generalized stability of the Cauchy and the Jensen functional equations on spheres. Zbl 1157.39019
Sikorska, Justyna
2008
Generalized orthogonal stability of some functional equations. Zbl 1133.39023
Sikorska, Justyna
2006
Alienation of the logarithmic and exponential functional equations. Zbl 1382.39031
Kominek, Zygfryd; Sikorska, Justyna
2016
Stability of the preservation of the equality of distance. Zbl 1083.39027
Sikorska, Justyna
2005
Sikorska, Justyna
2015
On a method of solving some functional equations for set-valued functions. Zbl 1428.39032
Sikorska, Justyna
2019
Differentiable solutions of a functional equation related to the non-power means. Zbl 0892.39019
Sikorska, Justyna
1998
On the equation of the $$\rho$$-orthogonal additivity. Zbl 1178.39037
Alsina, Claudi; Sikorska, Justyna; Santos Tomás, Maria
2007
On a functional equation related to power means. Zbl 1076.39020
Sikorska, Justyna
2003
Orthogonal stability of the Cauchy functional equation on balls in normed linear spaces. Zbl 1057.39026
Sikorska, Justyna
2004
Orthogonal stability of the Cauchy equation on balls. Zbl 0963.39029
Sikorska, Justyna
2000
Sandwich theorems for orthogonally additive functions. Zbl 1266.39031
Fechner, Włodzimierz; Sikorska, Justyna
2009
On a separation for the Cauchy equation on spheres. Zbl 1256.39017
Fechner, Włodzimierz; Sikorska, Justyna
2012
A singular behaviour of a set-valued approximate orthogonal additivity. Zbl 1347.41045
Sikorska, Justyna
2016
On stability of a general bilinear functional equation. Zbl 1470.39063
Bahyrycz, Anna; Sikorska, Justyna
2021
Note on a functional equation related to the power means. Zbl 0973.39015
Sikorska, Justyna
2000
The forty-sixth international symposium on functional equations, June 22–29, 2008, Opava, Czech Republic. Zbl 1204.39001
2009
On mappings preserving equilateral triangles in normed spaces. Zbl 1112.46023
Sikorska, Justyna; Szostok, Tomasz
2006
On a Jensen-Hosszú equation. II. Zbl 1382.39030
Kominek, Zygfryd; Sikorska, Justyna
2012
On a general bilinear functional equation. Zbl 1479.39029
Bahyrycz, Anna; Sikorska, Justyna
2021
On a $$\rho$$-orthogonally additive mappings. Zbl 1444.39028
Chmieliński, Jacek; Sikorska, Justyna; Wójcik, Paweł
2020
On stability of a general bilinear functional equation. Zbl 1470.39063
Bahyrycz, Anna; Sikorska, Justyna
2021
On a general bilinear functional equation. Zbl 1479.39029
Bahyrycz, Anna; Sikorska, Justyna
2021
On a $$\rho$$-orthogonally additive mappings. Zbl 1444.39028
Chmieliński, Jacek; Sikorska, Justyna; Wójcik, Paweł
2020
On a method of solving some functional equations for set-valued functions. Zbl 1428.39032
Sikorska, Justyna
2019
Alienation of the logarithmic and exponential functional equations. Zbl 1382.39031
Kominek, Zygfryd; Sikorska, Justyna
2016
A singular behaviour of a set-valued approximate orthogonal additivity. Zbl 1347.41045
Sikorska, Justyna
2016
Recent developments of the conditional stability of the homomorphism equation. Zbl 1312.39031
Brzdęk, Janusz; Fechner, Włodzimierz; Moslehian, Mohammad Sal; Sikorska, Justyna
2015
Orthogonalities and functional equations. Zbl 1316.39008
Sikorska, Justyna
2015
Sikorska, Justyna
2015
Hyperstability of the Fréchet equation and a characterization of inner product spaces. Zbl 1287.39017
Bahyrycz, Anna; Brzdȩk, Janusz; Piszczek, Magdalena; Sikorska, Justyna
2013
On a separation for the Cauchy equation on spheres. Zbl 1256.39017
Fechner, Włodzimierz; Sikorska, Justyna
2012
On a Jensen-Hosszú equation. II. Zbl 1382.39030
Kominek, Zygfryd; Sikorska, Justyna
2012
Variations on the Drygas equation and its stability. Zbl 1201.39023
Forti, Gian-Luigi; Sikorska, Justyna
2011
Norm derivatives and characterizations of inner product spaces. Zbl 1196.46001
Alsina, Claudi; Sikorska, Justyna; Tomás, M. Santos
2010
On a direct method for proving the Hyers-Ulam stability of functional equations. Zbl 1198.39039
Sikorska, Justyna
2010
A conditional exponential functional equation and its stability. Zbl 1187.39032
Brzdȩk, Janusz; Sikorska, Justyna
2010
On the stability of additivity. Zbl 1197.39016
Fechner, Włodzimierz; Sikorska, Justyna
2010
Exponential functional equation on spheres. Zbl 1205.39032
Sikorska, Justyna
2010
On two conditional Pexider functional equations and their stabilities. Zbl 1162.39018
Sikorska, Justyna
2009
On a Pexiderized conditional exponential functional equation. Zbl 1212.39039
Sikorska, J.
2009
Sandwich theorems for orthogonally additive functions. Zbl 1266.39031
Fechner, Włodzimierz; Sikorska, Justyna
2009
The forty-sixth international symposium on functional equations, June 22–29, 2008, Opava, Czech Republic. Zbl 1204.39001
2009
Generalized stability of the Cauchy and the Jensen functional equations on spheres. Zbl 1157.39019
Sikorska, Justyna
2008
On the equation of the $$\rho$$-orthogonal additivity. Zbl 1178.39037
Alsina, Claudi; Sikorska, Justyna; Santos Tomás, Maria
2007
Generalized orthogonal stability of some functional equations. Zbl 1133.39023
Sikorska, Justyna
2006
On mappings preserving equilateral triangles in normed spaces. Zbl 1112.46023
Sikorska, Justyna; Szostok, Tomasz
2006
Stability of the preservation of the equality of distance. Zbl 1083.39027
Sikorska, Justyna
2005
Orthogonal stability of the Cauchy functional equation on balls in normed linear spaces. Zbl 1057.39026
Sikorska, Justyna
2004
On a functional equation related to power means. Zbl 1076.39020
Sikorska, Justyna
2003
Orthogonal stability of the Cauchy equation on balls. Zbl 0963.39029
Sikorska, Justyna
2000
Note on a functional equation related to the power means. Zbl 0973.39015
Sikorska, Justyna
2000
Differentiable solutions of a functional equation related to the non-power means. Zbl 0892.39019
Sikorska, Justyna
1998
On the Cauchy equation on spheres. Zbl 0894.39009
Ger, Roman; Sikorska, Justyna
1997
Stability of the orthogonal additivity. Zbl 0833.39007
Ger, Roman; Sikorska, Justyna
1995
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all top 5

### Cited in 60 Serials

 33 Aequationes Mathematicae 17 Journal of Mathematical Analysis and Applications 10 Results in Mathematics 9 Journal of Inequalities and Applications 9 Journal of Function Spaces 7 Acta Mathematica Hungarica 6 Nonlinear Analysis. Theory, Methods & Applications. Series A: Theory and Methods 6 Annales Mathematicae Silesianae 6 Proyecciones 5 Bulletin of the Australian Mathematical Society 5 Advances in Difference Equations 4 Applied Mathematics Letters 4 Linear Algebra and its Applications 4 Journal of Fixed Point Theory and Applications 4 Korean Journal of Mathematics 3 Journal of Function Spaces and Applications 3 Banach Journal of Mathematical Analysis 3 Journal of Linear and Topological Algebra 2 Applied Mathematics and Computation 2 Archiv der Mathematik 2 Demonstratio Mathematica 2 Indagationes Mathematicae. New Series 2 Abstract and Applied Analysis 2 Acta Mathematica Scientia. Series B. (English Edition) 2 Tbilisi Mathematical Journal 2 Acta Universitatis Sapientiae. Mathematica 2 Advances in Mathematical Physics 2 Set-Valued and Variational Analysis 2 Annales Universitatis Paedagogicae Cracoviensis. Studia Mathematica 2 Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A: Matemáticas. RACSAM 2 Annals of Functional Analysis 2 Journal of Mathematical Extension 2 Palestine Journal of Mathematics 1 Rocky Mountain Journal of Mathematics 1 Functiones et Approximatio. Commentarii Mathematici 1 Functional Analysis and its Applications 1 Fuzzy Sets and Systems 1 Journal of Approximation Theory 1 Journal of Geometry 1 Proceedings of the American Mathematical Society 1 Proceedings of the Japan Academy. Series A 1 Semigroup Forum 1 Bulletin of the Korean Mathematical Society 1 Bulletin of the Iranian Mathematical Society 1 The Journal of Analysis 1 Boletín de la Sociedad Matemática Mexicana. Third Series 1 Acta Mathematica Sinica. English Series 1 Journal of the Korean Society of Mathematical Education. Series B. The Pure and Applied Mathematics 1 Nonlinear Functional Analysis and Applications 1 Journal of the Australian Mathematical Society 1 Journal of Applied Mathematics 1 Thai Journal of Mathematics 1 Fixed Point Theory and Applications 1 Applicable Analysis and Discrete Mathematics 1 Advances in Pure and Applied Mathematics 1 Journal of Mathematical Research with Applications 1 Journal of Applied Analysis and Computation 1 International Journal of Analysis and Applications 1 Sahand Communications in Mathematical Analysis 1 AIMS Mathematics
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### Cited in 24 Fields

 171 Difference and functional equations (39-XX) 55 Functional analysis (46-XX) 53 Operator theory (47-XX) 16 General topology (54-XX) 15 Real functions (26-XX) 5 Ordinary differential equations (34-XX) 5 Approximations and expansions (41-XX) 3 General and overarching topics; collections (00-XX) 3 Linear and multilinear algebra; matrix theory (15-XX) 3 Convex and discrete geometry (52-XX) 3 Numerical analysis (65-XX) 2 Field theory and polynomials (12-XX) 1 History and biography (01-XX) 1 Mathematical logic and foundations (03-XX) 1 Order, lattices, ordered algebraic structures (06-XX) 1 Number theory (11-XX) 1 Group theory and generalizations (20-XX) 1 Special functions (33-XX) 1 Harmonic analysis on Euclidean spaces (42-XX) 1 Integral equations (45-XX) 1 Geometry (51-XX) 1 Computer science (68-XX) 1 Operations research, mathematical programming (90-XX) 1 Biology and other natural sciences (92-XX)