Fixed point theory for multivalued φ-contractions

被引:0
作者
Vasile L Lazăr
机构
[1] Babeş-Bolyai University Cluj-Napoca,Department of Applied Mathematics
[2] Satu-Mare Branch,Vasile Goldiş Western University Arad
来源
Fixed Point Theory and Applications | / 2011卷
关键词
successive approximations; multivalued operator; Picard operator; weakly Picard operator; fixed point; strict fixed point; periodic point; strict periodic point; multivalued weakly Picard operator; multivalued Picard operator; data dependence; fractal operator; limit shadowing; set-to-set operator; Ulam-Hyers stability; sequence of operators;
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摘要
The purpose of this paper is to present a fixed point theory for multivalued φ-contractions using the following concepts: fixed points, strict fixed points, periodic points, strict periodic points, multivalued Picard and weakly Picard operators; data dependence of the fixed point set, sequence of multivalued operators and fixed points, Ulam-Hyers stability of a multivalued fixed point equation, well-posedness of the fixed point problem, limit shadowing property of a multivalued operator, set-to-set operatorial equations and fractal operators. Our results generalize some recent theorems given in Petruşel and Rus (The theory of a metric fixed point theorem for multivalued operators, Proc. Ninth International Conference on Fixed Point Theory and its Applications, Changhua, Taiwan, July 16-22, 2009, 161-175, 2010).
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