Fixed points, inner product spaces, and functional equations.
Fixed-point theorems for multi-valued functions and their applications to functional equations [Book]
Formes quadratiques sur un semi-groupe involutif.
Four variations on a theme of S. B. Presic concerning semigroup functional equations.
Fréchet's equation and Hyers theorem on noncommutative semigroups
Functional equation and its Hyers-Ulam stability.
Functional equations and *-representations on topological semigroups.
Functional equations of generalized associativity, bisymmetry, transitivity and distributivity.
Functional equations on abelian groups with involution.
Functional equations on A-orthogonal vectors.
Functional equations on restricted domains.
Functional equations on Sturm-Liouville hypergroups.
Functional equations related to inner product spaces.
Functional equations stemming from numerical analysis [Book]
Functional equations which caracterize n-forms and homogeneous functions of degree n.
Functional equations which caracterize n-forms and homogeneous functions of degree n. (Short Communication).
Functional inequalities associated with Jordan-von Neumann-type additive functional equations.
Functions having the Darboux property and satisfying some functional equation
Let X be a real linear topological space. We characterize solutions f:X → ℝ and M:ℝ → ℝ of the equation f(x+M(f(x))y) = f(x)f(y) under the assumption that f and M have the Darboux property.
Functions of Binomial Type Mapping Groupoids into Rings.
Functions with bounded nth differences