Elfen, Heather Hunt; Riedel, Thomas; Sahoo, Prasanna K. A variant of the quadratic functional equation on groups and an application. (English) Zbl 1416.39015 Bull. Korean Math. Soc. 54, No. 6, 2165-2182 (2017). Reviewer: Maryam Amyari (Mashhad) MSC: 39B52 20K30 PDF BibTeX XML Cite \textit{H. H. Elfen} et al., Bull. Korean Math. Soc. 54, No. 6, 2165--2182 (2017; Zbl 1416.39015) Full Text: DOI OpenURL
Elfen, Heather Hunt; Riedel, Thomas; Sahoo, Prasanna K. A variant of a generalized quadratic functional equation on groups. (English) Zbl 1371.39031 Result. Math. 72, No. 1-2, 555-571 (2017). MSC: 39B52 39B82 PDF BibTeX XML Cite \textit{H. H. Elfen} et al., Result. Math. 72, No. 1--2, 555--571 (2017; Zbl 1371.39031) Full Text: DOI OpenURL
Choi, Chang-Kwon; Chung, Jaeyoung; Riedel, Thomas; Sahoo, Prasanna K. Stability of functional equations arising from number theory and determinant of matrices. (English) Zbl 1369.39028 Ann. Funct. Anal. 8, No. 3, 329-340 (2017). MSC: 39B82 39B52 15A15 11C20 PDF BibTeX XML Cite \textit{C.-K. Choi} et al., Ann. Funct. Anal. 8, No. 3, 329--340 (2017; Zbl 1369.39028) Full Text: DOI Euclid OpenURL
Ebanks, Bruce; Riedel, Thomas; Sahoo, Prasanna K. On the order of a derivation. (English) Zbl 1383.39022 Aequationes Math. 90, No. 2, 335-340 (2016). MSC: 39B52 39B72 13N15 16W25 PDF BibTeX XML Cite \textit{B. Ebanks} et al., Aequationes Math. 90, No. 2, 335--340 (2016; Zbl 1383.39022) Full Text: DOI OpenURL
Hunt, Heather B.; Riedel, Thomas; Sahoo, Prasanna K. Erratum to: “On a functional equation on groups with an involution related to quadratic polynomials in two variables”. (English) Zbl 1390.39087 Aequationes Math. 90, No. 1, 97-98 (2016). MSC: 39B52 PDF BibTeX XML Cite \textit{H. B. Hunt} et al., Aequationes Math. 90, No. 1, 97--98 (2016; Zbl 1390.39087) Full Text: DOI OpenURL
Hunt, Heather B.; Riedel, Thomas; Sahoo, Prasanna K. On a functional equation on groups with an involution related to quadratic polynomials in two variables. (English) Zbl 1348.39011 Aequationes Math. 90, No. 1, 87-96 (2016); erratum ibid. 90, No. 1, 97-98 (2016). Reviewer: László Losonczi (Debrecen) MSC: 39B52 39B32 PDF BibTeX XML Cite \textit{H. B. Hunt} et al., Aequationes Math. 90, No. 1, 87--96 (2016; Zbl 1348.39011) Full Text: DOI OpenURL
Faziev, Valeri A.; Riedel, Thomas Stability of Jensen functional equation on semigroups. (English) Zbl 1188.39028 J. Math. Anal. Appl. 364, No. 2, 341-351 (2010). Reviewer: Maryam Amyari (Mashhad) MSC: 39B82 39B22 39B52 PDF BibTeX XML Cite \textit{V. A. Faziev} and \textit{T. Riedel}, J. Math. Anal. Appl. 364, No. 2, 341--351 (2010; Zbl 1188.39028) Full Text: DOI OpenURL
Moslehian, M. S.; Riedel, T.; Saadatpour, A. Norms of operators in \(X _{\lambda }\) spaces. (English) Zbl 1139.39039 Appl. Math. Lett. 20, No. 10, 1082-1087 (2007). Reviewer: Themistocles M. Rassias (Athens) MSC: 39B42 PDF BibTeX XML Cite \textit{M. S. Moslehian} et al., Appl. Math. Lett. 20, No. 10, 1082--1087 (2007; Zbl 1139.39039) Full Text: DOI OpenURL
Nikodem, Kazimierz; Riedel, Thomas; Sahoo, Prasanna K. The stability problem of the Hermite-Hadamard inequality. (English) Zbl 1117.39019 Math. Inequal. Appl. 10, No. 2, 359-363 (2007). Reviewer: Mohammad Sal Moslehian (Mashhad) MSC: 39B82 26A51 PDF BibTeX XML Cite \textit{K. Nikodem} et al., Math. Inequal. Appl. 10, No. 2, 359--363 (2007; Zbl 1117.39019) Full Text: DOI OpenURL
Riedel, Thomas; Sahoo, Prasanna K. A characterization of the Stolarsky mean. (English) Zbl 1080.26027 Aequationes Math. 70, No. 1-2, 51-62 (2005). Reviewer: József Sándor (Cluj-Napoca) MSC: 26E60 26D15 39B62 PDF BibTeX XML Cite \textit{T. Riedel} and \textit{P. K. Sahoo}, Aequationes Math. 70, No. 1--2, 51--62 (2005; Zbl 1080.26027) Full Text: DOI OpenURL
Riedel, Thomas; Sablik, Maciej; Sklar, Abe Polynomials and divided differences. (English) Zbl 1092.39021 Publ. Math. Debr. 66, No. 3-4, 313-326 (2005). Reviewer: Ilie Corovei (Cluj Napoca) MSC: 39B22 PDF BibTeX XML Cite \textit{T. Riedel} et al., Publ. Math. Debr. 66, No. 3--4, 313--326 (2005; Zbl 1092.39021) OpenURL
Riedel, Thomas; Sablik, Maciej A different version of Flett’s mean value theorem and an associated functional equation. (English) Zbl 1087.39510 Acta Math. Sin., Engl. Ser. 20, No. 6, 1073-1078 (2004). MSC: 39B22 PDF BibTeX XML Cite \textit{T. Riedel} and \textit{M. Sablik}, Acta Math. Sin., Engl. Ser. 20, No. 6, 1073--1078 (2004; Zbl 1087.39510) Full Text: DOI OpenURL
Powers, R. C.; Riedel, T. \(Z\)-semicontinuous posets. (English) Zbl 1061.06017 Order 20(2003), No. 4, 365-371 (2004). Reviewer: J. D. Lawson (Baton Rouge) MSC: 06B35 06A11 06B30 PDF BibTeX XML Cite \textit{R. C. Powers} and \textit{T. Riedel}, Order 20, No. 4, 365--371 (2004; Zbl 1061.06017) Full Text: DOI OpenURL
Abel, Ulrich; Ivan, Mircea; Riedel, Thomas The mean value theorem of Flett and divided differences. (English) Zbl 1060.26005 J. Math. Anal. Appl. 295, No. 1, 1-9 (2004). Reviewer: Ion Raşa (Cluj-Napoca) MSC: 26A24 PDF BibTeX XML Cite \textit{U. Abel} et al., J. Math. Anal. Appl. 295, No. 1, 1--9 (2004; Zbl 1060.26005) Full Text: DOI OpenURL
Das, M.; Riedel, T.; Sahoo, P. K. Hyers-Ulam stability of Flett’s points. (English) Zbl 1047.39018 Appl. Math. Lett. 16, No. 3, 269-271 (2003). MSC: 39B82 26A24 39B22 PDF BibTeX XML Cite \textit{M. Das} et al., Appl. Math. Lett. 16, No. 3, 269--271 (2003; Zbl 1047.39018) Full Text: DOI OpenURL
Riedel, Thomas; Wallace, Kelly On a Pexider type equation on \(\Delta^+\). (English) Zbl 1139.39312 Ann. Acad. Paedagog. Crac. 4, Stud. Math. 1, 129-137 (2001). MSC: 39B22 60E05 PDF BibTeX XML Cite \textit{T. Riedel} and \textit{K. Wallace}, Ann. Acad. Paedagog. Crac., Stud. Math. 4(1), 129--137 (2001; Zbl 1139.39312) OpenURL
Das, Manav; Riedel, Thomas; Sahoo, Prasanna K. Flett’s mean value theorem for approximately differentiable functions. (English) Zbl 1081.26001 Rad. Mat. 10, No. 2, 157-164 (2001). MSC: 26A24 PDF BibTeX XML Cite \textit{M. Das} et al., Rad. Mat. 10, No. 2, 157--164 (2001; Zbl 1081.26001) OpenURL
Powers, Robert C.; Riedel, Thomas; Sahoo, Prasanna K. Flett’s mean value theorem in topological vector spaces. (English) Zbl 1006.58007 Int. J. Math. Math. Sci. 27, No. 11, 689-694 (2001). Reviewer: A.Kriegl (Wien) MSC: 58C20 26E20 46G05 PDF BibTeX XML Cite \textit{R. C. Powers} et al., Int. J. Math. Math. Sci. 27, No. 11, 689--694 (2001; Zbl 1006.58007) Full Text: DOI EuDML OpenURL
Riedel, T.; Sablik, M.; Sahoo, P. K. On a functional equation in actuarial mathematics. (English) Zbl 0971.39012 J. Math. Anal. Appl. 253, No. 1, 16-34 (2001). Reviewer: János Aczél (Waterloo/Ontario) MSC: 39B22 26A15 39B12 62P05 PDF BibTeX XML Cite \textit{T. Riedel} et al., J. Math. Anal. Appl. 253, No. 1, 16--34 (2001; Zbl 0971.39012) Full Text: DOI OpenURL
Riedel, T.; Sablik, Maciej On a functional equation related to a generalization of Flett’s mean value theorem. (English) Zbl 0949.39009 Int. J. Math. Math. Sci. 23, No. 2, 103-107 (2000). Reviewer: János Aczél (Waterloo/Ontario) MSC: 39B22 26A24 PDF BibTeX XML Cite \textit{T. Riedel} and \textit{M. Sablik}, Int. J. Math. Math. Sci. 23, No. 2, 103--107 (2000; Zbl 0949.39009) Full Text: DOI EuDML OpenURL
Janowitz, M. F.; Powers, R. C.; Riedel, T. Primes, coprimes and multiplicative elements. (English) Zbl 1011.06009 Commentat. Math. Univ. Carol. 40, No. 4, 607-615 (1999). Reviewer: Václav Koubek (Praha) MSC: 06B23 06A15 06D10 PDF BibTeX XML Cite \textit{M. F. Janowitz} et al., Commentat. Math. Univ. Carol. 40, No. 4, 607--615 (1999; Zbl 1011.06009) Full Text: EuDML OpenURL
Davitt, R. M.; Powers, R. C.; Riedel, T.; Sahoo, P. K. Flett’s mean value theorem for holomorphic functions. (English) Zbl 1021.30003 Math. Mag. 72, No. 4, 304-307 (1999). Reviewer: Nikola Tuneski (Skopje) MSC: 30A99 26A24 PDF BibTeX XML Cite \textit{R. M. Davitt} et al., Math. Mag. 72, No. 4, 304--307 (1999; Zbl 1021.30003) Full Text: DOI OpenURL
Kannappan, Pl.; Riedel, T.; Sahoo, P. K. On a generalization of a functional equation associated with Simpson’s rule. (English) Zbl 1160.39320 Rocz. Nauk.-Dydakt., Pr. Mat. 15, 85-101 (1998). MSC: 39B22 PDF BibTeX XML Cite \textit{Pl. Kannappan} et al., Rocz. Nauk.-Dydakt., Pr. Mat. 15, 85--101 (1998; Zbl 1160.39320) OpenURL
Sahoo, P. K.; Riedel, T. Mean value theorems and functional equations. (English) Zbl 0980.39015 Singapore: World Scientific. xii, 245 p. (1998). Reviewer: János Aczél (Waterloo/Ontario) MSC: 39B22 39-02 26A24 26A42 39B42 26D15 30D05 39B32 PDF BibTeX XML Cite \textit{P. K. Sahoo} and \textit{T. Riedel}, Mean value theorems and functional equations. Singapore: World Scientific (1998; Zbl 0980.39015) OpenURL
Riedel, Thomas; Sablik, Maciej Characterizing polynomial functions by a mean value property. (English) Zbl 0920.39006 Publ. Math. Debr. 52, No. 3-4, 597-609 (1998). Reviewer: Roland Girgensohn (Lübeck) MSC: 39B52 26A24 26C05 PDF BibTeX XML Cite \textit{T. Riedel} and \textit{M. Sablik}, Publ. Math. Debr. 52, No. 3--4, 597--609 (1998; Zbl 0920.39006) OpenURL
Powers, R. C.; Riedel, T.; Sahoo, P. K. Limit properties of differential mean values. (English) Zbl 0923.26005 J. Math. Anal. Appl. 227, No. 1, 216-226 (1998). Reviewer: János Aczél (Waterloo/Ontario) MSC: 26A24 26A03 39B22 PDF BibTeX XML Cite \textit{R. C. Powers} et al., J. Math. Anal. Appl. 227, No. 1, 216--226 (1998; Zbl 0923.26005) Full Text: DOI OpenURL
Riedel, Thomas; Sahoo, Prasanna K. On two functional equations connected with the characterizations of the distance measures. (English) Zbl 0895.39007 Aequationes Math. 54, No. 3, 242-263 (1997). Reviewer: Th.M.Rassias (Athens) MSC: 39B32 60E05 PDF BibTeX XML Cite \textit{T. Riedel} and \textit{P. K. Sahoo}, Aequationes Math. 54, No. 3, 242--263 (1997; Zbl 0895.39007) Full Text: DOI EuDML OpenURL
Riedel, T.; Sahoo, P. K. A functional equation characterizing low degree polynomials in two variables. (English) Zbl 0880.39018 Demonstr. Math. 30, No. 1, 85-94 (1997). MSC: 39B22 PDF BibTeX XML Cite \textit{T. Riedel} and \textit{P. K. Sahoo}, Demonstr. Math. 30, No. 1, 85--94 (1997; Zbl 0880.39018) Full Text: DOI OpenURL
Kannappan, Pl.; Riedel, T.; Sahoo, P. K. On a functional equation associated with Simpson’s rule. (English) Zbl 0879.39007 Result. Math. 31, No. 1-2, 115-126 (1997). Reviewer: B.Choczewski (Kraków) MSC: 39B22 PDF BibTeX XML Cite \textit{Pl. Kannappan} et al., Result. Math. 31, No. 1--2, 115--126 (1997; Zbl 0879.39007) Full Text: DOI OpenURL
Powers, Robert C.; Riedel, Thomas When are continuous isotone bijections order automorphisms? (English) Zbl 0842.06009 Real Anal. Exch. 21(1995-96), No. 1, 154-164 (1996). MSC: 06B35 06B23 54C35 PDF BibTeX XML Cite \textit{R. C. Powers} and \textit{T. Riedel}, Real Anal. Exch. 21, No. 1, 154--164 (1996; Zbl 0842.06009) OpenURL
Powers, R. C.; Riedel, T.; Sahoo, P. K. On a model of plane geometry. (English) Zbl 0896.51011 Elem. Math. 51, No. 4, 171-175 (1996). Reviewer: P.Burda (Ostrava) MSC: 51G05 51A30 PDF BibTeX XML Cite \textit{R. C. Powers} et al., Elem. Math. 51, No. 4, 171--175 (1996; Zbl 0896.51011) Full Text: EuDML OpenURL
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 PDF BibTeX XML Cite \textit{T. Riedel} and \textit{P. K. Sahoo}, Publ. Math. Debr. 46, No. 1--2, 125--135 (1995; Zbl 0860.39032) OpenURL
Riedel, Thomas On sup-continuous triangle functions. (English) Zbl 0802.60022 J. Math. Anal. Appl. 184, No. 2, 382-388 (1994). Reviewer: T.Riedel (Louisville) MSC: 60E99 39B99 06F05 PDF BibTeX XML Cite \textit{T. Riedel}, J. Math. Anal. Appl. 184, No. 2, 382--388 (1994; Zbl 0802.60022) Full Text: DOI OpenURL
Powers, R. C.; Riedel, T.; Sahoo, P. K. Some models of geometries and a functional equation. (English) Zbl 0818.39007 Colloq. Math. 66, No. 1, 165-173 (1993). Reviewer: I.Corovei (Cluj-Napoca) MSC: 39B22 51M05 PDF BibTeX XML Cite \textit{R. C. Powers} et al., Colloq. Math. 66, No. 1, 165--173 (1993; Zbl 0818.39007) Full Text: DOI EuDML OpenURL
Riedel, Thomas Cauchy’s equation on \(\Delta{}^ +\): Further results. (English) Zbl 0765.39006 Aequationes Math. 44, No. 2-3, 236-248 (1992). Reviewer: J.Aczél (Waterloo / Ontario) MSC: 39B22 39B52 60E10 54E35 PDF BibTeX XML Cite \textit{T. Riedel}, Aequationes Math. 44, No. 2--3, 236--248 (1992; Zbl 0765.39006) Full Text: DOI EuDML OpenURL
Riedel, Thomas Cauchy’s equation on \(\Delta ^ +\). (English) Zbl 0733.39012 Aequationes Math. 41, No. 2-3, 192-211 (1991). Reviewer: H.L.Vasudeva (Chandigarh) MSC: 39B52 PDF BibTeX XML Cite \textit{T. Riedel}, Aequationes Math. 41, No. 2--3, 192--211 (1991; Zbl 0733.39012) Full Text: DOI EuDML OpenURL