The Homotopic Invariance for Fixed Points of Set-valued Nonexpansive Mappings*
نویسندگان
چکیده
T h e homotopic invariance of fixed points of set-valued contractions and nonexpansive mappings is studied. As application, nonlinear alternative principles are given. A LeraySchauder alternative and an antipodal theorem for set-valued nonexpansive mappings are also included.
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