Functional equations and inequalities in several variables

Functional Equations and Inequalities in Linear Spaces: Linear Spaces and Semilinear Topology Convex Functions Cauchy's Exponential Equation Polynomial Functions and Their Extensions Quadratic Mappings Quadratic Equation on an Interval Ulam-Hyers-Rassias Stability of Functional Equations: Additive Cauchy Equation Multiplicative Cauchy Equation Jensen's Functional Equation Gamma Functional Equation Stability of Homogeneous Mappings Stability of Functional Equations in Function Spaces Stability in the Lipschitz Norms Round-off Stability of Iterations Functional Equations in Set-Valued Functions: Cauchy's Set-Valued Functional Equation Pexider's Functional Equation Subadditive Set-Valued Functions Hahn-Banach Type Theorem and Applications Subquadratic Set-Valued Functions Iteration Semigroups of Set-Valued Functions.