Handbook of Functional Equations

On Some Functional Equations (M. Adam, S. Czerwik, K. Krol).- Remarks on Stability of the Equation of Homomorphism for Square Symmetric Groupoids (A. Bahyrycz, J. Brzdek).- On Stability of the Linear and Polynomial Functional Equations in Single Variable (J. Brzdek, M. Piszczek).- Selections of Set-Valued Maps Satisfying Some Inclusions and the Hyers-Ulam Stability (J. Brzdek, M. Piszczek).- Generalized Ulam-Hyers Stability Results: A Fixed Point Approach (L. Caradiu).- On a Wake Version of Hyers-Ulam Stability Theorem in Restricted Domain (J. Chung, J. Chang).- On the Stability of Drygas Functional Equation on Amenable Semigroups (E. Elqorachi, Y. Manar, Th.M. Rassias).- Stability of Quadratic and Drygas Functional Equations, with an Application for Solving an Alternative Quadratic Equation (G.L. Forti).- A Functional Equation Having Monomials and its Stability (M.E. Gorgji, H. Khodaei, Th.M. Rassias).- Some Functional Equations Related to the Characterizations of Information Measures and their Stability (E. Gselmann, G. Maksa).- Approximate Cauchy-Jensen Type Mappings in Quasi-ß Normed Spaces (H.-M. Kim, K.-W. Jun, E. Son).- An AQCQ-Functional Equation in Matrix Paranormed Spaces (J.R. Lee, C. Park, Th.M. Rassias, D.Y. Shin).- On the GEneralized Hyers-Ulam Stability of the Pexider Equation on Restricted Domains (Y. Manar, E. Elqorachi, Th.M. Rassias).- Hyers-Ulam Stability of Some Differential Equations and Differential Operators (D. Popa, I. Rasa).- Results and Problems in Ulam Stability of Operational Equations and Inclusions (I.A. Rus).- Superstability of Generalized Module Left Higher Derivations on a Multi-Banach Module (T.L. Shateri, Z. Afshari).- D'Alembert's Functional Equation and Superstability Problem in Hypergroups (D. Zeglami, A. Roukbi, Th.M. Rassias).