MATEMATIČKI VESNIK
МАТЕМАТИЧКИ ВЕСНИК



MATEMATIČKI VESNIK
Almost metric versions of Zhong's variational principle
Mihai Turinici

Abstract

A refinement of Zhong's variational principle [Nonlinear Anal. 29 (1997), 1421--1431] is given, in the realm of almost metric structures. Applications to equilibrium points are also provided.

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Keywords: Inf-proper lsc function; variational principle; maximal element; almost metric; Dependent Choice Principle; normal couple; equilibrium point.

MSC: 54F05, 47J20

Pages:  519--532     

Volume  65 ,  Issue  4 ,  2013