魯曉峰, 吳賢璇
(廣東工業(yè)大學(xué) 應(yīng)用數(shù)學(xué)學(xué)院, 廣州 510520)
廣義集值映射不動(dòng)點(diǎn)的推廣
魯曉峰, 吳賢璇
(廣東工業(yè)大學(xué) 應(yīng)用數(shù)學(xué)學(xué)院, 廣州 510520)
引入似度量空間的概念, 用上方下半連續(xù)方法證明了一類廣義S.B.Nadler集值壓縮映射在完備似度量空間中有不動(dòng)點(diǎn), 并推廣和改進(jìn)了一些已知結(jié)果.
似度量空間; 集值映射; 不動(dòng)點(diǎn)
不動(dòng)點(diǎn)理論研究在二十世紀(jì)二、三十年代十分熱門, 最初由荷蘭數(shù)學(xué)家Brouwer發(fā)現(xiàn)n維歐式空間中的單位球到單位球連續(xù)映射中, 存在一個(gè)不動(dòng)點(diǎn), 由此引起了許多數(shù)學(xué)研究者對這一方面的興趣, 隨后推廣到了集值不動(dòng)點(diǎn)[3,4]. 近幾十年來國內(nèi)也有不少文獻(xiàn)討論集值壓縮不動(dòng)點(diǎn)理論[10~12]. 本文主要使用上方下半連續(xù)方法證明廣義集值映射[12]有不動(dòng)點(diǎn).
本文的主要目的是討論一些集值映射不動(dòng)點(diǎn), 并推廣和改進(jìn)文[4]和[12]的一些主要結(jié)果.
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Fixed Point Theorems for Set-valued Mappings
LU Xiao-feng, WU Xian-xuan
(Guangdong University of Technology, School of Applied Mathematics, Guangzhou, Guangdong 510520)
In this paper, we introduce the concept of like-metric spaces and prove the set valued contractive mappings on complete like-metric space have a fixed point in a class of generalized S.B.Nadler using the method of lower semi-continuity from above, improve some well-known results.
like-metric space; set value mapping; fixed point
O177.91
A
1672-5298(2016)03-0014-07
2016-06-10
國家自然科學(xué)基金資助項(xiàng)目(10871052)
魯曉峰(1991- ), 女, 湖南湘潭人, 廣東工業(yè)大學(xué)應(yīng)用數(shù)學(xué)學(xué)院碩士研究生. 主要研究方向: 非線性泛函分析
吳賢璇(1991- ), 女, 廣東汕頭人, 廣東工業(yè)大學(xué)應(yīng)用數(shù)學(xué)學(xué)院碩士研究生. 主要研究方向: 非線性泛函分析