广义φ凹(凸)算子的不动点定理  

Fixed-point Theorems of Generalized φ- concave(convex) Operator

作　　者：王淑丽[1] 张建明[1] 

机构地区：[1]太原理工大学理学院,山西太原030024

出　　处：《华北工学院学报》2001年第5期354-356,共3页Journal of North China Institute of Technology

摘　　要：目的　讨论常微分方程、积分方程和偏微分方程解的存在性 .方法　利用正规锥和广义 φ凹 (-φ凸 )算子 .结果与结论　得到了不动点定理 ,推广了文献 [1Aim: To discuss the existence of a solution for differential equation and integral equation. Methods: The normal cone and the definition of generalized φ-concave(convex) operator are applied. Results and Conclusion: The fixed-point theorem and some new results have been obtained. The conclusion in [1] has been genearalized.

关 键 词：正规锥 广义α凹算子 不动点 广义α凸算子 

分 类 号：O177.91[理学—数学]