Chang, Ick-Soon; Lee, Eun Hwi; Kim, Hark-Mahn On Hyers-Ulam-Rassias stability of a quadratic functional equation. (English) Zbl 1024.39008 Math. Inequal. Appl. 6, No. 1, 87-95 (2003). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 39B82 39B52 PDFBibTeX XMLCite \textit{I.-S. Chang} et al., Math. Inequal. Appl. 6, No. 1, 87--95 (2003; Zbl 1024.39008) Full Text: DOI
Devillier, Chris G. Conditional Cauchy equations and applications. (English) Zbl 1024.39005 Aequationes Math. 64, No. 3, 201-217 (2002). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 39B52 39B05 20F28 20N05 PDFBibTeX XMLCite \textit{C. G. Devillier}, Aequationes Math. 64, No. 3, 201--217 (2002; Zbl 1024.39005) Full Text: DOI
Benz, Walter Characterizations of homomorphisms of skew fields. (English) Zbl 1024.39006 Aequationes Math. 64, No. 3, 315-320 (2002). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 39B52 PDFBibTeX XMLCite \textit{W. Benz}, Aequationes Math. 64, No. 3, 315--320 (2002; Zbl 1024.39006) Full Text: DOI
Kazantzis, Nikolaos On the existence and uniqueness of locally analytic invertible solutions of a system of nonlinear functional equations. (English) Zbl 1024.39007 J. Comput. Appl. Math. 146, No. 2, 301-308 (2002). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 39B72 PDFBibTeX XMLCite \textit{N. Kazantzis}, J. Comput. Appl. Math. 146, No. 2, 301--308 (2002; Zbl 1024.39007) Full Text: DOI
Czerwik, Stefan Functional equations and inequalities in several variables. (English) Zbl 1011.39019 Singapore: World Scientific. x, 410 p. (2002). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 39Bxx 39-02 PDFBibTeX XMLCite \textit{S. Czerwik}, Functional equations and inequalities in several variables. Singapore: World Scientific (2002; Zbl 1011.39019)
Taylor, Mark The aggregation equation: Solutions with non intersecting partial functions. (English) Zbl 0999.39021 Daróczy, Zoltán (ed.) et al., Functional equations–results and advances. Dordrecht: Kluwer Academic Publishers. Adv. Math., Dordr. 3, 351-360 (2002). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 39B52 91B64 20M14 PDFBibTeX XMLCite \textit{M. Taylor}, in: Functional equations---results and advances. Dordrecht: Kluwer Academic Publishers. 351--360 (2002; Zbl 0999.39021)
Krapež, Aleksandar Generalized associativity on rectangular quasigroups. (English) Zbl 0999.39022 Daróczy, Zoltán (ed.) et al., Functional equations–results and advances. Dordrecht: Kluwer Academic Publishers. Adv. Math., Dordr. 3, 335-349 (2002). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 39B52 20N02 20N05 PDFBibTeX XMLCite \textit{A. Krapež}, in: Functional equations---results and advances. Dordrecht: Kluwer Academic Publishers. 335--349 (2002; Zbl 0999.39022)
Baker, John A. Mappings whose derivatives are isometries. (English) Zbl 0999.39024 Daróczy, Zoltán (ed.) et al., Functional equations–results and advances. Dordrecht: Kluwer Academic Publishers. Adv. Math., Dordr. 3, 293-296 (2002). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 39B52 46B04 PDFBibTeX XMLCite \textit{J. A. Baker}, in: Functional equations---results and advances. Dordrecht: Kluwer Academic Publishers. 293--296 (2002; Zbl 0999.39024)
Davison, Thomas M. K. A generalization of d’Alembert’s functional equation. (English) Zbl 0999.39023 Daróczy, Zoltán (ed.) et al., Functional equations–results and advances. Dordrecht: Kluwer Academic Publishers. Adv. Math., Dordr. 3, 245-248 (2002). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 39B52 43A40 PDFBibTeX XMLCite \textit{T. M. K. Davison}, in: Functional equations---results and advances. Dordrecht: Kluwer Academic Publishers. 245--248 (2002; Zbl 0999.39023)
Gilányi, Attila An inequality, equivalent to the parallelogram equation. (Eine zur Parallelogrammgleichung äquivalente Ungleichung.) (German) Zbl 0992.39026 Aequationes Math. 62, No. 3, 303-309 (2001). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 39B62 39B52 PDFBibTeX XMLCite \textit{A. Gilányi}, Aequationes Math. 62, No. 3, 303--309 (2001; Zbl 0992.39026) Full Text: DOI
Sahoo, Prasanna K.; Székelyhidi, László On a functional equation related to digital filtering. (English) Zbl 0992.39025 Aequationes Math. 62, No. 3, 280-285 (2001). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 39B52 39B32 PDFBibTeX XMLCite \textit{P. K. Sahoo} and \textit{L. Székelyhidi}, Aequationes Math. 62, No. 3, 280--285 (2001; Zbl 0992.39025) Full Text: DOI
Lee, Sang Han; Jun, Kil-Woung On a generalized Pompeiu functional equation. (English) Zbl 0992.39020 Aequationes Math. 62, No. 3, 201-210 (2001). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 39B22 PDFBibTeX XMLCite \textit{S. H. Lee} and \textit{K.-W. Jun}, Aequationes Math. 62, No. 3, 201--210 (2001; Zbl 0992.39020) Full Text: DOI
Guzik, G. On continuity of measurable cocycles. (English) Zbl 0974.39012 J. Appl. Anal. 6, No. 2, 295-302 (2000). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 39B12 39B52 26A18 PDFBibTeX XMLCite \textit{G. Guzik}, J. Appl. Anal. 6, No. 2, 295--302 (2000; Zbl 0974.39012) Full Text: DOI
Oluyede, Broderick O. On some length biased inequalities for reliability measures. (English) Zbl 0987.39007 J. Inequal. Appl. 5, No. 5, 447-466 (2000). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 39B72 60K10 PDFBibTeX XMLCite \textit{B. O. Oluyede}, J. Inequal. Appl. 5, No. 5, 447--466 (2000; Zbl 0987.39007) Full Text: DOI EuDML
Brillouët-Belluot, Nicole; Ebanks, Bruce Localizable composable measures of fuzziness. II. (English) Zbl 0974.39016 Aequationes Math. 60, No. 3, 233-242 (2000). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 39B52 94A17 28E10 03E72 39B22 39B42 PDFBibTeX XMLCite \textit{N. Brillouët-Belluot} and \textit{B. Ebanks}, Aequationes Math. 60, No. 3, 233--242 (2000; Zbl 0974.39016) Full Text: DOI
Stetkær, Henrik D’Alembert’s and Wilson’s functional equations for vector and \(2\times 2\) matrix valued functions. (English) Zbl 0968.39012 Math. Scand. 87, No. 1, 115-132 (2000). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 39B42 39B52 PDFBibTeX XMLCite \textit{H. Stetkær}, Math. Scand. 87, No. 1, 115--132 (2000; Zbl 0968.39012) Full Text: DOI
Qi, Aiqin; Si, Jianguo Discussion on the continuous solutions of a functional equation. (English) Zbl 0968.39010 Ann. Differ. Equations 16, No. 1, 56-61 (2000). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 39B22 39B82 PDFBibTeX XMLCite \textit{A. Qi} and \textit{J. Si}, Ann. Differ. Equations 16, No. 1, 56--61 (2000; Zbl 0968.39010)
Ymeri, Hasan M. On a local form of generalized Lobatchewski’s functional equation. (English) Zbl 0968.39011 J. Math., Punjab Univ. 32, 67-72 (1999). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 39B22 PDFBibTeX XMLCite \textit{H. M. Ymeri}, J. Math., Punjab Univ. 32, 67--72 (1999; Zbl 0968.39011)
Batko, B.; Tabor, J. Stability of the generalized alternative Cauchy equation. (English) Zbl 0951.39007 Abh. Math. Semin. Univ. Hamb. 69, 67-73 (1999). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 39B82 39B62 39B52 PDFBibTeX XMLCite \textit{B. Batko} and \textit{J. Tabor}, Abh. Math. Semin. Univ. Hamb. 69, 67--73 (1999; Zbl 0951.39007) Full Text: DOI
Jabłoński, W. On a class of sets connected with a convex function. (English) Zbl 0952.39009 Abh. Math. Semin. Univ. Hamb. 69, 205-210 (1999). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 39B62 39B22 52A41 PDFBibTeX XMLCite \textit{W. Jabłoński}, Abh. Math. Semin. Univ. Hamb. 69, 205--210 (1999; Zbl 0952.39009) Full Text: DOI
Jung, S.-M.; Kim, B. On the stability of the quadratic functional equation on bounded domains. (English) Zbl 0952.39010 Abh. Math. Semin. Univ. Hamb. 69, 293-308 (1999). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 39B62 39B52 39B82 PDFBibTeX XMLCite \textit{S. M. Jung} and \textit{B. Kim}, Abh. Math. Semin. Univ. Hamb. 69, 293--308 (1999; Zbl 0952.39010) Full Text: DOI
Halter-Koch, Franz; Reich, Ludwig Additive functions commuting with Möbius transformations and field monomorphisms. (English) Zbl 0933.39050 Aequationes Math. 58, No. 1-2, 176-182 (1999). Reviewer: Pl.Kannappan (Waterloo /Ontario) MSC: 39B52 PDFBibTeX XMLCite \textit{F. Halter-Koch} and \textit{L. Reich}, Aequationes Math. 58, No. 1--2, 176--182 (1999; Zbl 0933.39050) Full Text: DOI
Rätz, Jürg Characterization of inner product spaces by means of orthogonally additive mappings. (English) Zbl 0933.39051 Aequationes Math. 58, No. 1-2, 111-117 (1999). Reviewer: Pl.Kannappan (Waterloo /Ontario) MSC: 39B55 46C05 PDFBibTeX XMLCite \textit{J. Rätz}, Aequationes Math. 58, No. 1--2, 111--117 (1999; Zbl 0933.39051) Full Text: DOI
Schleiermacher, Adolf Some remarks on Euclidean invariants. (English) Zbl 0933.39049 Aequationes Math. 58, No. 1-2, 100-110 (1999). Reviewer: Pl.Kannappan (Waterloo /Ontario) MSC: 39B52 51M05 PDFBibTeX XMLCite \textit{A. Schleiermacher}, Aequationes Math. 58, No. 1--2, 100--110 (1999; Zbl 0933.39049) Full Text: DOI
Stetkær, Henrik Generalized rectangular functional equations. (English) Zbl 0929.39010 Aequationes Math. 57, No. 1, 4-20 (1999). Reviewer: Pl.Kannappan (Waterloo /Ontario) MSC: 39B52 PDFBibTeX XMLCite \textit{H. Stetkær}, Aequationes Math. 57, No. 1, 4--20 (1999; Zbl 0929.39010) Full Text: DOI
Stetkær, Henrik Trigonometric functional equations of rectangular type. (English) Zbl 0929.39011 Aequationes Math. 56, No. 3, 251-270 (1998). Reviewer: Pl.Kannappan (Waterloo /Ontario) MSC: 39B52 PDFBibTeX XMLCite \textit{H. Stetkær}, Aequationes Math. 56, No. 3, 251--270 (1998; Zbl 0929.39011) Full Text: DOI
Losonczi, László A structure theorem for sum form functional equations. (English) Zbl 0869.39008 Aequationes Math. 53, No. 1-2, 141-154 (1997). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 39B32 39B62 PDFBibTeX XMLCite \textit{L. Losonczi}, Aequationes Math. 53, No. 1--2, 141--154 (1997; Zbl 0869.39008) Full Text: DOI EuDML
Stetkaer, Henrik Wilson’s functional equation on \(\mathbb{C}\). (English) Zbl 0869.39007 Aequationes Math. 53, No. 1-2, 91-107 (1997). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 39B32 PDFBibTeX XMLCite \textit{H. Stetkaer}, Aequationes Math. 53, No. 1--2, 91--107 (1997; Zbl 0869.39007) Full Text: DOI EuDML
Brzdȩk, Janusz On almost additive functions. (English) Zbl 0865.39007 Bull. Aust. Math. Soc. 54, No. 2, 281-290 (1996). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 39B52 PDFBibTeX XMLCite \textit{J. Brzdȩk}, Bull. Aust. Math. Soc. 54, No. 2, 281--290 (1996; Zbl 0865.39007) Full Text: DOI
Járai, A.; Székelyhidi, L. Regularization and general methods in the theory of functional equations. (English) Zbl 0858.39010 Aequationes Math. 52, No. 1-2, 10-29 (1996). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 39B05 PDFBibTeX XMLCite \textit{A. Járai} and \textit{L. Székelyhidi}, Aequationes Math. 52, No. 1--2, 10--29 (1996; Zbl 0858.39010) Full Text: DOI EuDML
Stetkaer, Henrik On a signed cosine equation of \(N\) summands. (English) Zbl 0858.39012 Aequationes Math. 51, No. 3, 294-302 (1996). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 39B32 PDFBibTeX XMLCite \textit{H. Stetkaer}, Aequationes Math. 51, No. 3, 294--302 (1996; Zbl 0858.39012) Full Text: DOI EuDML
Leong, Fook; Rajah, Andrew Moufang loops of odd order \(p_ 1^ 2p_ 2^ 2\cdots p_ m^ 2\). (English) Zbl 0860.20054 J. Algebra 181, No. 3, 876-883 (1996). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 20N05 PDFBibTeX XMLCite \textit{F. Leong} and \textit{A. Rajah}, J. Algebra 181, No. 3, 876--883 (1996; Zbl 0860.20054) Full Text: DOI
Ger, Roman; Semrl, Peter The stability of the exponential equation. (English) Zbl 0846.39013 Proc. Am. Math. Soc. 124, No. 3, 779-787 (1996). Reviewer: Pl.Kannappan (Waterloo / Ontario) MSC: 39B72 39B52 PDFBibTeX XMLCite \textit{R. Ger} and \textit{P. Semrl}, Proc. Am. Math. Soc. 124, No. 3, 779--787 (1996; Zbl 0846.39013) Full Text: DOI
Riedel, T.; Sahoo, P. K. On a generalization of a functional equation associated with the distance between the probability distributions. (English) Zbl 0860.39032 Publ. Math. Debr. 46, No. 1-2, 125-135 (1995). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 39B32 60E05 94A17 PDFBibTeX XMLCite \textit{T. Riedel} and \textit{P. K. Sahoo}, Publ. Math. Debr. 46, No. 1--2, 125--135 (1995; Zbl 0860.39032)
Dragomir, Sever Silvestru; Pearce, C. E. M.; Pečarić, Josip E. On Jessen’s related inequalities for isotonic sublinear functionals. (English) Zbl 0846.39012 Acta Sci. Math. 61, No. 1-4, 373-382 (1995). Reviewer: Pl.Kannappan (Waterloo / Ontario) MSC: 39B72 46C50 39B52 PDFBibTeX XMLCite \textit{S. S. Dragomir} et al., Acta Sci. Math. 61, No. 1--4, 373--382 (1995; Zbl 0846.39012)
Chung, J. K.; Ebanks, B. R.; Ng, C. T.; Sahoo, P. K. On a quadratic-trigonometric functional equation and some applications. (English) Zbl 0830.39014 Trans. Am. Math. Soc. 347, No. 4, 1131-1161 (1995); erratum ibid. 349, No. 11, 4691 (1997). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 39B52 39B32 PDFBibTeX XMLCite \textit{J. K. Chung} et al., Trans. Am. Math. Soc. 347, No. 4, 1131--1161 (1995; Zbl 0830.39014) Full Text: DOI
Stetkaer, Henrik Wilson’s functional equations on groups. (English) Zbl 0830.39016 Aequationes Math. 49, No. 3, 252-275 (1995). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 39B52 43A90 PDFBibTeX XMLCite \textit{H. Stetkaer}, Aequationes Math. 49, No. 3, 252--275 (1995; Zbl 0830.39016) Full Text: DOI EuDML
Haruki, S.; Ng, C. T. Partial difference equations analogous to the Cauchy-Riemann equations and related functional equations on rings and fields. (English) Zbl 0830.39015 Result. Math. 26, No. 3-4, 316-323 (1994). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 39B52 30D05 PDFBibTeX XMLCite \textit{S. Haruki} and \textit{C. T. Ng}, Result. Math. 26, No. 3--4, 316--323 (1994; Zbl 0830.39015) Full Text: DOI
Chung, J. K.; Ebanks, B. R.; Ng, C. T.; Sahoo, P. K.; Zeng, W. B. On a functional equation of Abel. (English) Zbl 0830.39013 Result. Math. 26, No. 3-4, 241-252 (1994). Reviewer: Pl.Kannappan (Waterloo/Ontario) MSC: 39B52 PDFBibTeX XMLCite \textit{J. K. Chung} et al., Result. Math. 26, No. 3--4, 241--252 (1994; Zbl 0830.39013) Full Text: DOI
Gajda, Zbigniew Unitary representations of topological groups and functional equations. (English) Zbl 0721.39006 J. Math. Anal. Appl. 152, No. 1, 6-19 (1990). Reviewer: PL.Kannappan (Waterloo/Ontario) MSC: 39B52 22A25 PDFBibTeX XMLCite \textit{Z. Gajda}, J. Math. Anal. Appl. 152, No. 1, 6--19 (1990; Zbl 0721.39006) Full Text: DOI