E. Elqorachi

activity

20142024

most citedA Fixed Points Approach to stability of the Pexider Equation

3 citations · 10 across the 17 of their papers we have counts for

collaborators

Showing 2023 · math.FAShow all

2 papers · 2 filters

math.FA2023

A Kannappan-cosine functional equation on semigroups

Ahmed Jafar, Omar Ajebbar, Elhoucien Elqorachi

We determine the complex-valued solutions of the Kannappan cosine functional law $g (x y z_{0}) = g (x) g (y) - f (x) f (y)$ , $x, y \in S$ , where $S$ is a semigroup and $z_{0}$ is a fixed element…

math.FA2023

Cosine and Sine addition and subtraction law with an automorphism

Youssef Aserrar, Elhoucien Elqorachi

Let $S$ be a semigroup. Our main results is that we describe the complex-valued solutions of the following functional equations \[g(xσ(y)) = g(x)g(y)+f(x)f(y),\ x,y\in S,\] \[f(xσ(…