13 citations · 65 across the 22 of their papers we have counts for
8 papers · 1 filter
On Berinde's paper "Comments on some fixed point theorems in metric spaces"
Constantin Zalinescu
In Theorem 1 of the paper [V. Pata, A fixed point theorem in metric spaces, J. Fixed Point Theory Appl., 10 (2011), 299-305] it is proved that Picard's iterates for a function conv…
On the global shape of convex functions on locally convex spaces
Constantin Zalinescu
In the recent paper \cite{Aza:19} D Azagra studies the global shape of continuous convex functions defined on a Banach space . More precisely, when is separable, it is shown…
Minimal element theorems revisited
Andreas H Hamel, Constantin Zalinescu
Starting with the Brezis-Browder principle, we give stronger versions of many variational principles and minimal element theorems which appeared in the recent literature. Relations…
On three open problems related to quasi relative interior
C. Zalinescu
We give answers to two questions formulated by Borwein and Goebel in 2003 and to a conjecture formulated by Grad and Pop in 2014 related to calculus rules for quasi (relative) inte…
On some extension theorems for multifunctions
Constantin Zalinescu
In this short note we give counterexamples to several results related to extension theorems published recently.
Relations between the convexity of a set and the differentiability of its support function
C. Zalinescu
It is known that, in finite dimensions, the support function of a compact convex set with non empty interior is differentiable excepting the origin if and only if the set is strict…