由集值映射的拓扑度延拓理论,推导出了上半连续集值1-集压缩映射的拓扑度.研究了上半连续集值1-集压缩映射的不动点定理.

According to the extensive theory of topological degree for set-valued mapping ,the authors derive the topological degree for upper semicontinuous set-valued 1-set-contractive mapping. With the topological degree, the fixed theorems for upper semicontinuous set-valued 1-set-contractive mapping is studied.

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