International Journal of Mathematics and Mathematical Sciences
Volume 23 (2000), Issue 2, Pages 141-151
doi:10.1155/S0161171200000727
Abstract
Notions of a boundedly convex function and of a
Lipschitz-continuous function are extended to the case of
functions on pseudo-topological vector spaces. It is proved that
for “good” pseudo-topologizers Ψ, any continuous Ψ-boundedly convex function is Ψ-differentiable
and its derivative is Ψ-Lipschitz-continuous. As a corollary,
it is shown that any boundedly convex function is Hyers-Lang
differentiable.