Brzdęk, Janusz; El-hady, El-sayed; Schwaiger, Jens Investigations on the Hyers-Ulam stability of generalized radical functional equations. (English) Zbl 1441.39029 Aequationes Math. 94, No. 3, 575-593 (2020). Reviewer: Mohammad Sal Moslehian (Mashhad) MSC: 39B82 39B52 PDFBibTeX XMLCite \textit{J. Brzdęk} et al., Aequationes Math. 94, No. 3, 575--593 (2020; Zbl 1441.39029) Full Text: DOI
Brzdęk, Janusz; Schwaiger, Jens Remarks on solutions to a generalization of the radical functional equations. (English) Zbl 1397.39016 Aequationes Math. 92, No. 5, 975-991 (2018). Reviewer: Eszter Gselmann (Debrecen) MSC: 39B52 39B22 PDFBibTeX XMLCite \textit{J. Brzdęk} and \textit{J. Schwaiger}, Aequationes Math. 92, No. 5, 975--991 (2018; Zbl 1397.39016) Full Text: DOI
Brzdęk, Janusz; Leśniak, Zbigniew; Malejki, Renata On the generalized Fréchet functional equation with constant coefficients and its stability. (English) Zbl 1390.39085 Aequationes Math. 92, No. 2, 355-373 (2018). MSC: 39B52 39B82 47H10 PDFBibTeX XMLCite \textit{J. Brzdęk} et al., Aequationes Math. 92, No. 2, 355--373 (2018; Zbl 1390.39085) Full Text: DOI
El-Hady, El-Sayed; Brzdęk, Janusz; Nassar, Hamed On the structure and solutions of functional equations arising from queueing models. (English) Zbl 1441.39022 Aequationes Math. 91, No. 3, 445-477 (2017). MSC: 39B32 05A15 30D05 30E25 60K25 65Q20 PDFBibTeX XMLCite \textit{E.-S. El-Hady} et al., Aequationes Math. 91, No. 3, 445--477 (2017; Zbl 1441.39022) Full Text: DOI
Brzdęk, Janusz; El-hady, El-sayed; Förg-Rob, Wolfgang; Leśniak, Zbigniew A note on solutions of a functional equation arising in a queuing model for a LAN gateway. (English) Zbl 1345.30030 Aequationes Math. 90, No. 4, 671-681 (2016). MSC: 30D05 30E25 39B32 PDFBibTeX XMLCite \textit{J. Brzdęk} et al., Aequationes Math. 90, No. 4, 671--681 (2016; Zbl 1345.30030) Full Text: DOI
Brzdȩk, Janusz; Najdecki, Adam; Xu, Bing Two general theorems on superstability of functional equations. (English) Zbl 1322.39011 Aequationes Math. 89, No. 3, 771-783 (2015). Reviewer: Jacek Chmieliński (Kraków) MSC: 39B82 39B42 39B62 PDFBibTeX XMLCite \textit{J. Brzdȩk} et al., Aequationes Math. 89, No. 3, 771--783 (2015; Zbl 1322.39011) Full Text: DOI
Brzdęk, Janusz Remarks on stability of some inhomogeneous functional equations. (English) Zbl 1316.39011 Aequationes Math. 89, No. 1, 83-96 (2015). Reviewer: Jacek Chmieliński (Kraków) MSC: 39B82 39B55 PDFBibTeX XMLCite \textit{J. Brzdęk}, Aequationes Math. 89, No. 1, 83--96 (2015; Zbl 1316.39011) Full Text: DOI
Bahyrycz, Anna; Brzdȩk, Janusz A note on d’Alembert’s functional equation on a restricted domain. (English) Zbl 1305.39016 Aequationes Math. 88, No. 1-2, 169-173 (2014). Reviewer: Peter P. Zabreĭko (Minsk) MSC: 39B52 39B55 PDFBibTeX XMLCite \textit{A. Bahyrycz} and \textit{J. Brzdȩk}, Aequationes Math. 88, No. 1--2, 169--173 (2014; Zbl 1305.39016) Full Text: DOI
Brzdęk, Janusz; Stević, Stevo Behaviour at infinity of solutions of some linear functional equations in normed spaces. (English) Zbl 1300.39005 Aequationes Math. 87, No. 3, 379-389 (2014). Reviewer: Choonkil Park (Daejeon) MSC: 39B52 39B22 PDFBibTeX XMLCite \textit{J. Brzdęk} and \textit{S. Stević}, Aequationes Math. 87, No. 3, 379--389 (2014; Zbl 1300.39005) Full Text: DOI
Brzdȩk, Janusz Remarks on hyperstability of the Cauchy functional equation. (English) Zbl 1303.39016 Aequationes Math. 86, No. 3, 255-267 (2013). Reviewer: Pál Burai (Debrecen) MSC: 39B82 39B55 PDFBibTeX XMLCite \textit{J. Brzdȩk}, Aequationes Math. 86, No. 3, 255--267 (2013; Zbl 1303.39016) Full Text: DOI
Brzdęk, Janusz Stability of the equation of the \(p\)-Wright affine functions. (English) Zbl 1272.39015 Aequationes Math. 85, No. 3, 497-503 (2013). Reviewer: Ghadir Sadeghi (Sabzevār) MSC: 39B82 39B62 39B52 46L57 PDFBibTeX XMLCite \textit{J. Brzdęk}, Aequationes Math. 85, No. 3, 497--503 (2013; Zbl 1272.39015) Full Text: DOI
Brzdȩk, Janusz; Stević, Stevo A note on stability of polynomial equations. (English) Zbl 1277.39037 Aequationes Math. 85, No. 3, 519-527 (2013). Reviewer: Ghadir Sadeghi (Sabzevār) MSC: 39B52 39B82 PDFBibTeX XMLCite \textit{J. Brzdȩk} and \textit{S. Stević}, Aequationes Math. 85, No. 3, 519--527 (2013; Zbl 1277.39037) Full Text: DOI
Bahyrycz, Anna; Brzdȩk, Janusz On solutions of the d’Alembert equation on a restricted domain. (English) Zbl 1277.39036 Aequationes Math. 85, No. 1-2, 169-183 (2013). Reviewer: Ioannis P. Stavroulakis (Ioannina) MSC: 39B52 39B55 PDFBibTeX XMLCite \textit{A. Bahyrycz} and \textit{J. Brzdȩk}, Aequationes Math. 85, No. 1--2, 169--183 (2013; Zbl 1277.39036) Full Text: DOI
Brillouët-Belluot, Nicole; Brzdȩk, Janusz; Chudziak, Jacek On solutions of Aczél’s equation and some related equations. (English) Zbl 1215.39023 Aequationes Math. 80, No. 1-2, 27-44 (2010). Reviewer: Stefan Czerwik (Gliwice) MSC: 39B12 39B22 39B52 PDFBibTeX XMLCite \textit{N. Brillouët-Belluot} et al., Aequationes Math. 80, No. 1--2, 27--44 (2010; Zbl 1215.39023) Full Text: DOI
Brzdȩk, Janusz; Pietrzyk, Andrzej A note on stability of the general linear equation. (English) Zbl 1149.39018 Aequationes Math. 75, No. 3, 267-270 (2008). Reviewer: Jacek Chmieliński (Kraków) MSC: 39B82 39B52 PDFBibTeX XMLCite \textit{J. Brzdȩk} and \textit{A. Pietrzyk}, Aequationes Math. 75, No. 3, 267--270 (2008; Zbl 1149.39018) Full Text: DOI
Brzdȩk, Janusz A remark on solutions of a generalization of the addition formulae. (English) Zbl 1094.39020 Aequationes Math. 71, No. 3, 288-293 (2006). Reviewer: János Aczél (Waterloo/Ontario) MSC: 39B22 39B12 PDFBibTeX XMLCite \textit{J. Brzdȩk}, Aequationes Math. 71, No. 3, 288--293 (2006; Zbl 1094.39020) Full Text: DOI
Brzdȩk, Janusz The Gołąb-Schinzel equation and its generalizations. (English) Zbl 1078.39021 Aequationes Math. 70, No. 1-2, 14-24 (2005). Reviewer: János Aczél (Waterloo/Ontario) MSC: 39B22 39B52 39B82 39-02 PDFBibTeX XMLCite \textit{J. Brzdȩk}, Aequationes Math. 70, No. 1--2, 14--24 (2005; Zbl 1078.39021) Full Text: DOI
Brzdȩk, Janusz Bounded solutions of the Gołab-Schinzel equation. (English) Zbl 0961.39011 Aequationes Math. 59, No. 3, 248-254 (2000). Reviewer: Bogdan Choczewski (Kraków) MSC: 39B52 PDFBibTeX XMLCite \textit{J. Brzdȩk}, Aequationes Math. 59, No. 3, 248--254 (2000; Zbl 0961.39011) Full Text: DOI
Brzdȩk, Janusz On the Baxter functional equation. (English) Zbl 0857.39011 Aequationes Math. 52, No. 1-2, 105-111 (1996). Reviewer: J.Aczél (Waterloo/Ontario) MSC: 39B22 PDFBibTeX XMLCite \textit{J. Brzdȩk}, Aequationes Math. 52, No. 1--2, 105--111 (1996; Zbl 0857.39011) Full Text: DOI EuDML
Brzdȩk, Janusz On a generalization of the Cauchy functional equation. (English) Zbl 0788.39004 Aequationes Math. 46, No. 1-2, 56-75 (1993). Reviewer: G.L.Forti (Milano) MSC: 39B52 39B22 39B32 PDFBibTeX XMLCite \textit{J. Brzdȩk}, Aequationes Math. 46, No. 1--2, 56--75 (1993; Zbl 0788.39004) Full Text: DOI EuDML
Brzdȩk, Janusz Subgroups of the group \(Z_ n\) and a generalization of the Gołąb- Schinzel functional equation. (English) Zbl 0757.39003 Aequationes Math. 43, No. 1, 59-71 (1992). Reviewer: K.Baron (Katowice) MSC: 39B12 39B52 20E07 PDFBibTeX XMLCite \textit{J. Brzdȩk}, Aequationes Math. 43, No. 1, 59--71 (1992; Zbl 0757.39003) Full Text: DOI
Brzdȩk, Janusz Subgroups of the Clifford group. (English) Zbl 0737.20021 Aequationes Math. 41, No. 2-3, 123-135 (1991). Reviewer: G.Rosenberger (Dortmund) MSC: 20H20 20E07 39B52 20E15 PDFBibTeX XMLCite \textit{J. Brzdȩk}, Aequationes Math. 41, No. 2--3, 123--135 (1991; Zbl 0737.20021) Full Text: DOI EuDML