On zeros and fixed points of multifunctions with non-compact convex domains

We present a stability theorem of Ulam-Hyers type for K-convex set-valued functions, and prove that a set-valued function is K-convex if and only if it is K-midconvex and K-quasiconvex.

Coincidence and fixed point theorems for functions in $S$ -KKM class on generalized convex spaces.

Kuo, Tian-Yuan, Huang, Young-Ye, Jeng, Jyh-Chung, Shih, Chen-Yuh (2006)

Fixed Point Theory and Applications [electronic only]

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Some remarks and applications of an extension of a lemma of Ky Fan

Salvatore Sessa (1988)

Commentationes Mathematicae Universitatis Carolinae

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KKM theorem with applications to lower and upper bounds equilibrium problem in $G$ -convex spaces.

Fakhar, M., Zafarani, J. (2003)

International Journal of Mathematics and Mathematical Sciences

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