A Levi–Civita functional equation on semigroups |
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Authors: | Stetkr Henrik |
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Institution: | Stetkær,Henrik |
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Abstract: | Aequationes mathematicae - Let S be a semigroup. We describe the solutions $$f,g:S \rightarrow \mathbb {C}$$ of the functional equation $$\begin{aligned} f(xy) = f(x)g(y) + g(x)f(y) - g(x)g(y), \... |
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