Benzarouala, Chaimaa; Brzdęk, Janusz; Oubbi, Lahbib A fixed point theorem and Ulam stability of a general linear functional equation in random normed spaces. (English) Zbl 1504.39046 J. Fixed Point Theory Appl. 25, No. 1, Paper No. 33, 38 p. (2023). MSC: 39B82 39B52 47H10 PDFBibTeX XMLCite \textit{C. Benzarouala} et al., J. Fixed Point Theory Appl. 25, No. 1, Paper No. 33, 38 p. (2023; Zbl 1504.39046) Full Text: DOI
Brzdęk, Janusz; Fošner, Ajda; Leśniak, Zbigniew A note on asymptotically approximate generalized Lie derivations. (English) Zbl 1441.16042 J. Fixed Point Theory Appl. 22, No. 2, Paper No. 40, 13 p. (2020). MSC: 16W25 46J20 PDFBibTeX XMLCite \textit{J. Brzdęk} et al., J. Fixed Point Theory Appl. 22, No. 2, Paper No. 40, 13 p. (2020; Zbl 1441.16042) Full Text: DOI
Brzdęk, Janusz; El-Hady, El-Sayed; Leśniak, Zbigniew Fixed-point theorem in classes of function with values in a dq-metric space. (English) Zbl 1441.39023 J. Fixed Point Theory Appl. 20, No. 4, Paper No. 143, 16 p. (2018). MSC: 39B42 39B82 47A63 47H10 PDFBibTeX XMLCite \textit{J. Brzdęk} et al., J. Fixed Point Theory Appl. 20, No. 4, Paper No. 143, 16 p. (2018; Zbl 1441.39023) Full Text: DOI
Brzdȩk, Janusz; El-hady, El-sayed; Leśniak, Zbigniew On fixed points of a linear operator of polynomial form of order 3. (English) Zbl 1479.47042 J. Fixed Point Theory Appl. 20, No. 2, Paper No. 85, 10 p. (2018). MSC: 47H10 47A63 47J26 PDFBibTeX XMLCite \textit{J. Brzdȩk} et al., J. Fixed Point Theory Appl. 20, No. 2, Paper No. 85, 10 p. (2018; Zbl 1479.47042) Full Text: DOI
Brzdȩk, Janusz; Piszczek, Magdalena Fixed points of some nonlinear operators in spaces of multifunctions and the Ulam stability. (English) Zbl 1417.39079 J. Fixed Point Theory Appl. 19, No. 4, 2441-2448 (2017). Reviewer: Ghadir Sadeghi (Sabzevār) MSC: 39B82 39B52 47H10 54C60 PDFBibTeX XMLCite \textit{J. Brzdȩk} and \textit{M. Piszczek}, J. Fixed Point Theory Appl. 19, No. 4, 2441--2448 (2017; Zbl 1417.39079) Full Text: DOI
Bahyrycz, Anna; Brzdęk, Janusz; Jabłońska, Eliza; Olko, Jolanta On functions that are approximate fixed points almost everywhere and Ulam’s type stability. (English) Zbl 1328.39041 J. Fixed Point Theory Appl. 17, No. 4, 659-668 (2015). MSC: 39B82 47H10 PDFBibTeX XMLCite \textit{A. Bahyrycz} et al., J. Fixed Point Theory Appl. 17, No. 4, 659--668 (2015; Zbl 1328.39041) Full Text: DOI