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1

A fixed point theorem in n-Banach spaces and Ulam stability

Brzdęk, Janusz, Ciepliński, Krzysztof

Journal:

Journal of Mathematical Analysis and Applications

Year:

2018

Language:

english

File:

PDF, 341 KB

english, 2018

2

Stability of additivity and fixed point methods

Brzdęk, Janusz

Journal:

Fixed Point Theory and Applications

Year:

2013

Language:

english

File:

PDF, 231 KB

english, 2013

3

Ulam's stability of a generalization of the Fréchet functional equation

Bahyrycz, Anna, Brzdęk, Janusz, Jabłońska, Eliza, Malejki, Renata

Journal:

Journal of Mathematical Analysis and Applications

Year:

2016

Language:

english

File:

PDF, 357 KB

english, 2016

4

A conditional exponential functional equation and its stability

Janusz Brzdęk, Justyna Sikorska

Journal:

Nonlinear Analysis: Theory, Methods & Applications

Year:

2010

Language:

english

File:

PDF, 733 KB

english, 2010

5

A fixed point approach to stability of functional equations

Janusz Brzdȩk, Jacek Chudziak, Zsolt Páles

Journal:

Nonlinear Analysis: Theory, Methods & Applications

Year:

2011

Language:

english

File:

PDF, 211 KB

english, 2011

6

The Gołab–Schinzel equation and its generalizations

Journal:

Aequationes Mathematicae

Year:

2005

Language:

english

File:

PDF, 159 KB

english, 2005

7

On a conditional Gołab-Schinzel equation

Janusz Brzdek, Anna Mureńko

Journal:

Archiv der Mathematik

Year:

2005

Language:

english

File:

PDF, 105 KB

english, 2005

8

On measurable orthogonally exponential functions

Journal:

Archiv der Mathematik

Year:

1999

Language:

english

File:

PDF, 80 KB

english, 1999

9

A fixed point approach to the stability of functional equations in non-Archimedean metric spaces

Janusz Brzdȩk, Krzysztof Ciepliński

Journal:

Nonlinear Analysis: Theory, Methods & Applications

Year:

2011

Language:

english

File:

PDF, 247 KB

english, 2011

10

A fixed point theorem and the Hyers–Ulam stability in non-Archimedean spaces

Brzdȩk, Janusz, Ciepliński, Krzysztof

Journal:

Journal of Mathematical Analysis and Applications

Year:

2013

Language:

english

File:

PDF, 224 KB

english, 2013

11

Remarks on the Hyers–Ulam stability of some systems of functional equations

Janusz Brzdęk, Krzysztof Ciepliński

Journal:

Applied Mathematics and Computation

Year:

2012

Language:

english

File:

PDF, 243 KB

english, 2012

12

A fixed point theorem and the Hyers-Ulam stability in Riesz spaces

Bogdan Batko, Janusz Brzdęk

Journal:

Advances in Difference Equations

Year:

2013

Language:

english

File:

PDF, 224 KB

english, 2013

13

A note on d’Alembert’s functional equation on a restricted domain

Bahyrycz, Anna, Brzdȩk, Janusz

Journal:

Aequationes Mathematicae

Year:

2014

Language:

english

File:

PDF, 159 KB

english, 2014

14

Hyperstability and Superstability

Brzdęk, Janusz, Ciepliński, Krzysztof

Journal:

Abstract and Applied Analysis

Year:

2013

Language:

english

File:

PDF, 242 KB

english, 2013

15

Fixed points of some nonlinear operators in spaces of multifunctions and the Ulam stability

Brzdęk, Janusz, Piszczek, Magdalena

Journal:

Journal of Fixed Point Theory and Applications

Year:

2017

Language:

english

File:

PDF, 446 KB

english, 2017

16

[Springer Optimization and Its Applications] Developments in Functional Equations and Related Topics Volume 124 || Homomorphisms from Functional Equations in Probability

Brzdęk, Janusz, Ciepliński, Krzysztof, Rassias, Themistocles M.

Year:

2017

Language:

english

File:

PDF, 485 KB

english, 2017

17

On hyperstability of the biadditive functional equation

EL-FASSI, Iz-iddine, BRZDĘK, Janusz, CHAHBI, Abdellatif, KABBAJ, Samir

Journal:

Acta Mathematica Scientia

Year:

2017

Language:

english

File:

PDF, 297 KB

english, 2017

18

ON THE HYPERSTABILITY OF A PEXIDERISED -QUADRATIC FUNCTIONAL EQUATION ON SEMIGROUPS

EL-FASSI, IZ-IDDINE, BRZDĘK, JANUSZ

Journal:

Bulletin of the Australian Mathematical Society

Year:

2018

Language:

english

File:

PDF, 200 KB

english, 2018

19

On fixed points of a linear operator of polynomial form of order 3

Brzdȩk, Janusz, El-hady, El-sayed, Leśniak, Zbigniew

Journal:

Journal of Fixed Point Theory and Applications

Year:

2018

Language:

english

File:

PDF, 463 KB

english, 2018

20

Survey on Recent Ulam Stability Results Concerning Derivations

Brzdęk, Janusz, Cădariu, Liviu, Ciepliński, Krzysztof, Fošner, Ajda, Leśniak, Zbigniew

Journal:

Journal of Function Spaces

Year:

2016

Language:

english

File:

PDF, 1.93 MB

english, 2016

21

Ulam’s Type Stability and Fixed Points Methods 2016

Brzdęk, Janusz, Cădariu, Liviu, Ciepliński, Krzysztof, Fošner, Ajda, Leśniak, Zbigniew, Xu, Bing

Journal:

Journal of Function Spaces

Year:

2016

Language:

english

File:

PDF, 1.80 MB

english, 2016

22

A fixed point theorem and the Ulam stability in generalized dq-metric spaces

Brzdęk, Janusz, Karapınar, Erdal, Petruşel, Adrian

Journal:

Journal of Mathematical Analysis and Applications

Year:

2018

Language:

english

File:

PDF, 1016 KB

english, 2018

23

On the quotient stability of a family of functional equations

Journal:

Nonlinear Analysis: Theory, Methods & Applications

Year:

2009

Language:

english

File:

PDF, 632 KB

english, 2009

24

Selections of set-valued maps satisfying a linear inclusion in a single variable

Janusz Brzdȩk, Dorian Popa, Bing Xu

Journal:

Nonlinear Analysis: Theory, Methods & Applications

Year:

2011

Language:

english

File:

PDF, 226 KB

english, 2011

25

Remarks on stability of linear recurrence of higher order

Janusz Brzdȩk, Dorian Popa, Bing Xu

Journal:

Applied Mathematics Letters

Year:

2010

Language:

english

File:

PDF, 292 KB

english, 2010

26

On nonstability of the linear recurrence of order one

Janusz Brzdȩk, Dorian Popa, Bing Xu

Journal:

Journal of Mathematical Analysis and Applications

Year:

2010

Language:

english

File:

PDF, 163 KB

english, 2010

27

On approximate solutions of the linear functional equation of higher order

Janusz Brzdȩk, Dorian Popa, Bing Xu

Journal:

Journal of Mathematical Analysis and Applications

Year:

2011

Language:

english

File:

PDF, 215 KB

english, 2011

28

On the Baxter functional equation

Journal:

Aequationes Mathematicae

Year:

1996

Language:

english

File:

PDF, 238 KB

english, 1996

29

On the Baxter functional equation

Journal:

Aequationes Mathematicae

Year:

1996

Language:

english

File:

PDF, 34 KB

english, 1996

30

On a generalization of the Cauchy functional equation

Journal:

Aequationes Mathematicae

Year:

1993

Language:

english

File:

PDF, 991 KB

english, 1993

31

On a generalization of the Cauchy functional equation

Journal:

Aequationes Mathematicae

Year:

1992

Language:

english

File:

PDF, 86 KB

english, 1992

32

Subgroups of the groupZnand a generalization of the Gołąb-Schinzel functional equation

Journal:

Aequationes Mathematicae

Year:

1992

Language:

english

File:

PDF, 590 KB

english, 1992

33

Subgroups of the Clifford group

Journal:

Aequationes Mathematicae

Year:

1991

Language:

english

File:

PDF, 596 KB

english, 1991

34

A remark on solutions of a generalization of the addition formulae

Journal:

Aequationes Mathematicae

Year:

2006

Language:

english

File:

PDF, 111 KB

english, 2006

35

A note on stability of the general linear equation

Janusz Brzdȩk, Andrzej Pietrzyk

Journal:

Aequationes Mathematicae

Year:

2008

Language:

english

File:

PDF, 105 KB

english, 2008

36

On solutions of Aczél’s equation and some related equations

Nicole Brillouët-Belluot, Janusz Brzdȩk, Jacek Chudziak

Journal:

Aequationes Mathematicae

Year:

2010

Language:

english

File:

PDF, 271 KB

english, 2010

37

The Hyers–Ulam stability of nonlinear recurrences

Janusz Brzdȩk, Dorian Popa, Bing Xu

Journal:

Journal of Mathematical Analysis and Applications

Year:

2007

Language:

english

File:

PDF, 117 KB

english, 2007

38

On approximately additive functions

Journal:

Journal of Mathematical Analysis and Applications

Year:

2011

Language:

english

File:

PDF, 178 KB

english, 2011

39

Note on nonstability of the linear functional equation of higher order

Janusz Brzdȩk, Dorian Popa, Bing Xu

Journal:

Computers & Mathematics with Applications

Year:

2011

Language:

english

File:

PDF, 267 KB

english, 2011

40

[Springer Optimization and Its Applications] Functional Equations in Mathematical Analysis Volume 52 || Scalar Riemann–Hilbert Problem for Multiply Connected Domains

Rassias, Themistocles M., Brzdek, Janusz

Year:

2012

Language:

english

File:

PDF, 419 KB

english, 2012

41

Remarks on the stability of Lie homomorphisms

Brzdȩk, Janusz, Fošner, Ajda

Journal:

Journal of Mathematical Analysis and Applications

Year:

2013

Language:

english

File:

PDF, 245 KB

english, 2013

42

A note on stability of polynomial equations

Brzdȩk, Janusz, Stević, Stevo

Journal:

Aequationes Mathematicae

Year:

2013

Language:

english

File:

PDF, 178 KB

english, 2013

43

[Springer Optimization and Its Applications] Functional Equations in Mathematical Analysis Volume 52 || Ternary Semigroups and Ternary Algebras

Rassias, Themistocles M., Brzdek, Janusz

Year:

2012

Language:

english

File:

PDF, 392 KB

english, 2012

44

[Springer Optimization and Its Applications] Functional Equations in Mathematical Analysis Volume 52 ||

Rassias, Themistocles M., Brzdek, Janusz

Year:

2012

Language:

english

File:

PDF, 5.74 MB

english, 2012

45

Fixed points of a mapping and Hyers–Ulam stability

Badora, Roman, Brzdȩk, Janusz

Journal:

Journal of Mathematical Analysis and Applications

Year:

2014

Language:

english

File:

PDF, 251 KB

english, 2014

46

Remarks on stability and non-stability of the linear functional equation of the first order

Brzdęk, Janusz, Popa, Dorian, Xu, Bing

Journal:

Applied Mathematics and Computation

Year:

2014

Language:

english

File:

PDF, 351 KB

english, 2014

47

Behaviour at infinity of solutions of some linear functional equations in normed spaces

Brzdęk, Janusz, Stević, Stevo

Journal:

Aequationes Mathematicae

Year:

2014

Language:

english

File:

PDF, 210 KB

english, 2014

48

On solutions of the d’Alembert equation on a restricted domain

Anna Bahyrycz,Janusz Brzdȩk

Journal:

Aequationes Mathematicae

Year:

2013

Language:

english

File:

PDF, 221 KB

english, 2013

49

On functional which are orthogonally additive modulo Z

Journal:

Results in Mathematics

Year:

1996

Language:

english

File:

PDF, 992 KB

english, 1996

50

Remarks on stability of some inhomogeneous functional equations

Brzdęk, Janusz

Journal:

Aequationes Mathematicae

Year:

2015

Language:

english

File:

PDF, 249 KB

english, 2015

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