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Minimax Theory and its Applications 05 (2020), No. 1, 001--006
Copyright Heldermann Verlag 2020

Erratum to "Quasi-Equilibrium Problems and Fixed Point Theorems of the Sum of l.s.c. and u.s.c. Mappings"

Nguyen Xuan Tan
Institute of Mathematics, 18 Hoang Quoc Viet, 10307 Hanoi, Vietnam

Nguyen Quynh Hoa
Thai Nguyen University of Economics and Business Administration, Tan Thinh Ward, Thai Nguyen City, Vietnam

Nguyen Ba Minh
Thoungmai University, Hanoi, Vietnam

The purpose of this note is to correct the proof of Theorem 3.1 in our paper "Quasi-equilibrium problems and fixed point theorems of the sum of l.s.c. and u.s.c. mappings", Minimax Theory and its Applications 3(1) (2018) 57--72. We made a mistake in the use of Sion's Minimax Theorem.

Keywords: Erratum, quasi-equilibrium problem, upper semi-continuous mapping, lower semi-continuous mapping, fixed point theorem.

MSC: 49J27, 49J53, 91B50, 90C48.

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