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Henrik Stetkær

Extensions of the sine addition law on groups

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Let G be a group, and let χ and μ be characters of G. We find the solutions of the functional equation f(xy) = f(x) χ(y) + μ(x) f(y) , x, y∈ G, where f: G→ C is the unknown function. This enables us to solve its Pexiderized version f(xy) = g(x) h1(y) + μ(x) h2(y) , x, y∈ G, in which f, g, h1, h2: G→ C are the unknown functions.

Original languageEnglish
JournalAequationes Mathematicae
Pages (from-to)467-484
Number of pages18
Publication statusPublished - 2019

    Research areas

  • Character, FUNCTIONAL-EQUATION, Functional equation, Group, Levi-Civita, Sine addition law

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