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arXiv · 2401.06147

A Kannappan-sine subtraction law on semigroups

Ahmed Jafar·Omar Ajebbar·Elhoucien Elqorachi
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Abstract

Let $S$ be a semigroup, $z_0$ a fixed element in $S$ and $\sigma:S \longrightarrow S$ an involutive automorphism. We determine the complex-valued solutions of Kannappan-sine subtraction law $f(x\sigma(y)z_0)=f(x)g(y)-f(y)g(x),\; x,y \in S$. As an application we solve the following variant of Kannappan-sine subtraction law viz. $f(x\sigma(y)z_0)=f(x)g(y)-f(y)g(x)+\lambda g(x\sigma(y)z_0) ,\; x,y \in S,$ where $\lambda \in \mathbb{C}^{*}$. The continuous solutions on topological semigroups are given and an example to illustrate the main results is also given.

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Ahmed Jafar, Omar Ajebbar, Elhoucien Elqorachi. 2023-12-08. A Kannappan-sine subtraction law on semigroups. https://arxiv.org/abs/2401.06147

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