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A Kannappan-cosine functional equation on semigroups

Functional Analysis 2023-05-05 v1 General Mathematics

Abstract

We determine the complex-valued solutions of the Kannappan cosine functional law g(xyz0)=g(x)g(y)f(x)f(y)g(xyz_{0})=g(x)g(y)-f(x)f(y), x,ySx,y\in S, where SS is a semigroup and z0z_{0} is a fixed element in S.S.

Cite

@article{arxiv.2305.02924,
  title  = {A Kannappan-cosine functional equation on semigroups},
  author = {Ahmed Jafar and Omar Ajebbar and Elhoucien Elqorachi},
  journal= {arXiv preprint arXiv:2305.02924},
  year   = {2023}
}
R2 v1 2026-06-28T10:25:48.420Z