Special Issue on Leonhard Paul Euler’s: Functional Equations and Inequalities (F. E. I.) (original) (raw)

First Issue (F. E. I.) consisting of 14 research papers, 181 pages long, contains various parts of Functional Equations and Inequalities, namely: Euler’s Life and Work, Ulam stability, Hyers – Ulam stability and Ulam – Gavruta - Rassias stability of functional equations, Euler – Lagrange type and Euler – Lagrange – Rassias quadratic mappings in Banach and Hilbert spaces, Aleksandrov and isometry Ulam stability problems, stability of Pexider and Drygas functional equations, alternative of fixed point, and Hyers - Ulam stability of differential equations.