Benzarouala, Chaimaa; Brzdęk, Janusz; El-hady, El-sayed; Oubbi, Lahbib On Ulam stability of the inhomogeneous version of the general linear functional equation. (English) Zbl 1515.39017 Result. Math. 78, No. 3, Paper No. 76, 32 p. (2023). Reviewer: Jacek Chmieliński (Kraków) MSC: 39B82 37B52 47H10 PDFBibTeX XMLCite \textit{C. Benzarouala} et al., Result. Math. 78, No. 3, Paper No. 76, 32 p. (2023; Zbl 1515.39017) Full Text: DOI
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; Eghbali, Nasrin; Kalvandi, Vida On Ulam stability of a generalized delayed differential equation of fractional order. (English) Zbl 1491.34085 Result. Math. 77, No. 1, Paper No. 26, 21 p. (2022). MSC: 34K37 34K27 47N20 PDFBibTeX XMLCite \textit{J. Brzdęk} et al., Result. Math. 77, No. 1, Paper No. 26, 21 p. (2022; Zbl 1491.34085) Full Text: DOI
Badora, Roman; Brzdęk, Janusz Banach limit in the stability problem of a linear functional equation. (English) Zbl 1467.39019 Result. Math. 76, No. 1, Paper No. 51, 18 p. (2021). MSC: 39B82 39B52 PDFBibTeX XMLCite \textit{R. Badora} and \textit{J. Brzdęk}, Result. Math. 76, No. 1, Paper No. 51, 18 p. (2021; Zbl 1467.39019) 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 (ed.); Cădariu, Liviu (ed.); Ciepliński, Krzysztof (ed.); Fošner, Ajda (ed.); Leśniak, Zbigniew (ed.); Xu, Bing (ed.) Editorial: Ulam’s type stability and fixed points methods 2016. (English) Zbl 1344.00007 J. Funct. Spaces 2016, Article ID 7205848, 2 p. (2016). MSC: 00B15 39-06 39B82 PDFBibTeX XMLCite \textit{J. Brzdęk} (ed.) et al., J. Funct. Spaces 2016, Article ID 7205848, 2 p. (2016; Zbl 1344.00007) Full Text: DOI
Brzdęk, Janusz; Cădariu, Liviu; Ciepliński, Krzysztof; Fošner, Ajda; Leśniak, Zbigniew Survey on recent Ulam stability results concerning derivations. (English) Zbl 1347.39025 J. Funct. Spaces 2016, Article ID 1235103, 9 p. (2016). MSC: 39B82 39B52 46L57 PDFBibTeX XMLCite \textit{J. Brzdęk} et al., J. Funct. Spaces 2016, Article ID 1235103, 9 p. (2016; Zbl 1347.39025) Full Text: DOI
Brzdȩk, Janusz; Eghbali, Nasrin On approximate solutions of some delayed fractional differential equations. (English) Zbl 1381.34103 Appl. Math. Lett. 54, 31-35 (2016). MSC: 34K37 34A08 34K07 39B82 PDFBibTeX XMLCite \textit{J. Brzdȩk} and \textit{N. Eghbali}, Appl. Math. Lett. 54, 31--35 (2016; Zbl 1381.34103) Full Text: DOI
Xu, Bing; Brzdęk, Janusz Hyers-Ulam stability of a system of first order linear recurrences with constant coefficients. (English) Zbl 1418.39027 Discrete Dyn. Nat. Soc. 2015, Article ID 269356, 5 p. (2015). MSC: 39B82 PDFBibTeX XMLCite \textit{B. Xu} and \textit{J. Brzdęk}, Discrete Dyn. Nat. Soc. 2015, Article ID 269356, 5 p. (2015; Zbl 1418.39027) 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
Brzdęk, Janusz; Fechner, Włodzimierz; Moslehian, Mohammad Sal; Sikorska, Justyna Recent developments of the conditional stability of the homomorphism equation. (English) Zbl 1312.39031 Banach J. Math. Anal. 9, No. 3, 278-326 (2015). MSC: 39B82 39B55 PDFBibTeX XMLCite \textit{J. Brzdęk} et al., Banach J. Math. Anal. 9, No. 3, 278--326 (2015; Zbl 1312.39031) Full Text: DOI Euclid
Brzdęk, Janusz; Ciepliński, Krzysztof; Leśniak, Zbigniew On Ulam’s type stability of the linear equation and related issues. (English) Zbl 1419.39053 Discrete Dyn. Nat. Soc. 2014, Article ID 536791, 14 p. (2014). MSC: 39B82 PDFBibTeX XMLCite \textit{J. Brzdęk} et al., Discrete Dyn. Nat. Soc. 2014, Article ID 536791, 14 p. (2014; Zbl 1419.39053) Full Text: DOI
Badora, Roman; Brzdȩk, Janusz Fixed points of a mapping and Hyers-Ulam stability. (English) Zbl 1311.39035 J. Math. Anal. Appl. 413, No. 1, 450-457 (2014). MSC: 39B82 39B52 PDFBibTeX XMLCite \textit{R. Badora} and \textit{J. Brzdȩk}, J. Math. Anal. Appl. 413, No. 1, 450--457 (2014; Zbl 1311.39035) Full Text: DOI
Brzdȩk, Janusz; Cădariu, Liviu; Ciepliński, Krzysztof Fixed point theory and the Ulam stability. (English) Zbl 1314.39029 J. Funct. Spaces 2014, Article ID 829419, 16 p. (2014). MSC: 39B82 47H10 PDFBibTeX XMLCite \textit{J. Brzdȩk} et al., J. Funct. Spaces 2014, Article ID 829419, 16 p. (2014; Zbl 1314.39029) Full Text: DOI
Batko, Bogdan; Brzdęk, Janusz A fixed point theorem and the Hyers-Ulam stability in Riesz spaces. (English) Zbl 1391.39031 Adv. Difference Equ. 2013, Paper No. 138, 12 p. (2013). MSC: 39B82 47H10 PDFBibTeX XMLCite \textit{B. Batko} and \textit{J. Brzdęk}, Adv. Difference Equ. 2013, Paper No. 138, 12 p. (2013; Zbl 1391.39031) Full Text: DOI
Brzdęk, Janusz Hyperstability of the Cauchy equation on restricted domains. (English) Zbl 1313.39037 Acta Math. Hung. 141, No. 1-2, 58-67 (2013). Reviewer: Henrik Stetkaer (Aarhus) MSC: 39B82 39B52 PDFBibTeX XMLCite \textit{J. Brzdęk}, Acta Math. Hung. 141, No. 1--2, 58--67 (2013; Zbl 1313.39037) Full Text: DOI
Brzdęk, Janusz Stability of additivity and fixed point methods. (English) Zbl 1297.39026 Fixed Point Theory Appl. 2013, Paper No. 285, 9 p. (2013). MSC: 39B82 39B55 PDFBibTeX XMLCite \textit{J. Brzdęk}, Fixed Point Theory Appl. 2013, Paper No. 285, 9 p. (2013; Zbl 1297.39026) Full Text: DOI
Brzdȩk, Janusz; Ciepliński, Krzysztof Hyperstability and superstability. (English) Zbl 1293.39013 Abstr. Appl. Anal. 2013, Article ID 401756, 13 p. (2013). MSC: 39B82 39-02 PDFBibTeX XMLCite \textit{J. Brzdȩk} and \textit{K. Ciepliński}, Abstr. Appl. Anal. 2013, Article ID 401756, 13 p. (2013; Zbl 1293.39013) Full Text: DOI
Bahyrycz, Anna; Brzdȩk, Janusz; Piszczek, Magdalena On approximately \(p\)-Wright affine functions in ultrametric spaces. (English) Zbl 1287.39016 J. Funct. Spaces Appl. 2013, Article ID 723545, 7 p. (2013). MSC: 39B82 39B52 54E35 PDFBibTeX XMLCite \textit{A. Bahyrycz} et al., J. Funct. Spaces Appl. 2013, Article ID 723545, 7 p. (2013; Zbl 1287.39016) Full Text: DOI
Brillouët-Belluot, Nicole; Brzdȩk, Janusz; Ciepliński, Krzysztof On some recent developments in Ulam’s type stability. (English) Zbl 1259.39019 Abstr. Appl. Anal. 2012, Article ID 716936, 41 p. (2012). MSC: 39B82 39B52 PDFBibTeX XMLCite \textit{N. Brillouët-Belluot} et al., Abstr. Appl. Anal. 2012, Article ID 716936, 41 p. (2012; Zbl 1259.39019) Full Text: DOI
Brzdȩk, Janusz; Popa, Dorian; Xu, Bing Remarks on stability of the linear functional equation in single variable. (English) Zbl 1248.39022 Pardalos, Panos M. (ed.) et al., Nonlinear analysis. Stability, approximation, and inequalities. In honor of Themistocles M. Rassias on the occasion of his 60th birthday. New York, NY: Springer (ISBN 978-1-4614-3497-9/hbk; 978-1-4614-3498-6/ebook). Springer Optimization and Its Applications 68, 91-119 (2012). MSC: 39B82 39B52 PDFBibTeX XMLCite \textit{J. Brzdȩk} et al., Springer Optim. Appl. 68, 91--119 (2012; Zbl 1248.39022) Full Text: DOI
Brzdęk, Janusz; Chudziak, Jacek; Páles, Zsolt A fixed point approach to stability of functional equations. (English) Zbl 1236.39022 Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 74, No. 17, 6728-6732 (2011). Reviewer: Themistocles M. Rassias (Athens) MSC: 39B22 PDFBibTeX XMLCite \textit{J. Brzdęk} et al., Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 74, No. 17, 6728--6732 (2011; Zbl 1236.39022) Full Text: DOI
Brzdȩk, Janusz; Jung, Soon-Mo A note on stability of an operator linear equation of the second order. (English) Zbl 1273.39023 Abstr. Appl. Anal. 2011, Article ID 602713, 15 p. (2011). MSC: 39B82 47A50 PDFBibTeX XMLCite \textit{J. Brzdȩk} and \textit{S.-M. Jung}, Abstr. Appl. Anal. 2011, Article ID 602713, 15 p. (2011; Zbl 1273.39023) Full Text: DOI
Brzdȩk, Janusz On approximately additive functions. (English) Zbl 1235.39017 J. Math. Anal. Appl. 381, No. 1, 299-307 (2011). Reviewer: Jens Schwaiger (Graz) MSC: 39B52 39B55 PDFBibTeX XMLCite \textit{J. Brzdȩk}, J. Math. Anal. Appl. 381, No. 1, 299--307 (2011; Zbl 1235.39017) Full Text: DOI
Brzdȩk, Janusz; Popa, Dorian; Xu, Bing Selections of set-valued maps satisfying a linear inclusion in a single variable. (English) Zbl 1205.39025 Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 74, No. 1, 324-330 (2011). Reviewer: Jacek Chmieliński (Kraków) MSC: 39B82 54C65 39B52 39B62 54C60 PDFBibTeX XMLCite \textit{J. Brzdȩk} et al., Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 74, No. 1, 324--330 (2011; Zbl 1205.39025) Full Text: DOI
Brzdȩk, Janusz; Popa, Dorian; Xu, Bing On approximate solutions of the linear functional equation of higher order. (English) Zbl 1204.65147 J. Math. Anal. Appl. 373, No. 2, 680-689 (2011). Reviewer: Jan Sieber (Portsmouth) MSC: 65Q20 39B12 39B82 PDFBibTeX XMLCite \textit{J. Brzdȩk} et al., J. Math. Anal. Appl. 373, No. 2, 680--689 (2011; Zbl 1204.65147) Full Text: DOI
Jung, Soon-Mo; Brzdȩk, Janusz Hyers-Ulam stability of the delay equation \(y'(t)=\lambda y(t-\tau )\). (English) Zbl 1210.34108 Abstr. Appl. Anal. 2010, Article ID 372176, 10 p. (2010). MSC: 34K27 34K06 PDFBibTeX XMLCite \textit{S.-M. Jung} and \textit{J. Brzdȩk}, Abstr. Appl. Anal. 2010, Article ID 372176, 10 p. (2010; Zbl 1210.34108) Full Text: DOI
Brzdȩk, Janusz; Popa, Dorian; Xu, Bing The Hyers-Ulam stability of nonlinear recurrences. (English) Zbl 1123.39022 J. Math. Anal. Appl. 335, No. 1, 443-449 (2007). Reviewer: Maryam Amyari (Mashhad) MSC: 39B82 39B52 PDFBibTeX XMLCite \textit{J. Brzdȩk} et al., J. Math. Anal. Appl. 335, No. 1, 443--449 (2007; Zbl 1123.39022) Full Text: DOI
Brzdęk, J.; Popa, D.; Xu, B. Note on nonstability of the linear recurrence. (English) Zbl 1126.39019 Abh. Math. Semin. Univ. Hamb. 76, 183-189 (2006). Reviewer: Themistocles M. Rassias (Athens) MSC: 39B82 39B52 PDFBibTeX XMLCite \textit{J. Brzdęk} et al., Abh. Math. Semin. Univ. Hamb. 76, 183--189 (2006; Zbl 1126.39019) Full Text: DOI