This treatise deals with modern theory of functional equations in several variables and their applications to mathematics, information theory, and the natural,
The notion of stability of functional equations of several variables in the sense used here had its origins more than half a century ago when S. Ulam posed the
Many books have been written on the theory of functional equations, but very few help readers solve functional equations in mathematics competitions and mathema
The theory of hypergroups is a rapidly developing area of mathematics due to its diverse applications in different areas like probability, harmonic analysis, et
The notion of stability of functional equations of several variables in the sense used here had its origins more than half a century ago when S. Ulam posed the
