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The theory of hypergroups is a rapidly developing area of mathematics due to its diverse applications in different areas like probability, harmonic analysis, et

This book presents current research on Ulam stability for functional equations and inequalities. Contributions from renowned scientists emphasize fundamental an

This handbook consists of seventeen chapters written by eminent scientists from the international mathematical community, who present important research works i

Functional Equations, Inequalities and Applications provides an extensive study of several important equations and inequalities, useful in a number of problems

The stability problem for approximate homomorphisms, or the Ulam stability problem, was posed by S. M. Ulam in the year 1941. The solution of this problem for v