局部G-凸空间上上[下]半连续映射的几乎不动点和不动点

• 作 者: 朴勇杰
• 机 构: Department of Mathematics, Yanbian University, Yanji City, Jilin, 133002
• 出 处: 东北数学（英文版）
• 发表日期: 2005年4期
• 关键词: G-convex space upper [lower

In this paper, we use the well known KKM type theorem for generalized convex spaces due to Park (Elements of the KKM theory for generalized convex spaces, Korean J. Comp. Appl. Math., 7(2000), 1-28) to obtain an almost fixed point theorem for upper [resp., lower] semicontinuous multimaps in locally G-convex spaces, and then give a fixed point theorem for upper semicontinuous multimap with closed Г-convex values.