On set-valued solutions of a functional equation of Drygas

Functional equations in several variables: with applications to mathematics, information theory, and to the natural and social sciences

Choice Reviews Online · 1989 · 867 citations

Natural Sciences, Mathematics, Differential Equations +15

An embedding theorem for spaces of convex sets

Hans Rådström · Proceedings of the American Mathematical Society · 1952 · 451 citations · Full text

Natural Sciences, Property Law, Interior Construction +10

On Convex Functions

Mohamad Mehdi · Journal of the London Mathematical Society · 1964 · 102 citations

Social Sciences, Mathematics, Information Theory +10

A Common Generalization of Functional Equations Characterizing Normed and Quasi-Inner-Product Spaces

Bruce Ebanks, Pl. Kannappan, Prasanna K. Sahoo · Canadian Mathematical Bulletin · 1992 · 71 citations · Full text

Natural Sciences, Mathematics, Dynamical Systems +9