Integral Kannappan-Sine subtraction and addition law on semigroups

Ajebbar Omar, Elqorachi Elhoucien, Jafar Ahmed

Let $S$ be a semigroup, $\mu$ a discrete measure on $S$ and $\sigma :S⟶S$ is an involutive automorphism. We determine the complex-valued solutions of the integral Kannappan…