Invariant Submeans and Semigroups of Non
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Anthony To-Ming Lau; Wataru Takahashi
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Article
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1996
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Elsevier Science
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English
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In this paper we study the relation between invariant submean and normal structure in a Banach space. This is used to give an improvement and different proof of a fixed point theorem of Lim (also of Belluce and Kirk for commutative semigroups) for left reversible semigroup of nonexpansive mappings o