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ASYMPTOTIC BEHAVIOR FOR COMMUTATIVE SEMIGROUPS OF ALMOST ASYMPTOTICALLY NONEXPANSIVE TYPE MAPPINGS 被引量:1
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作者 曾六川 《Acta Mathematica Scientia》 SCIE CSCD 2006年第2期246-254,共9页
This article introduces the concept of commutative semigroups of almost asymptotically nonexpansive-type mappings in a Banach space X which has the Opial property and whose norm is UKK, and establishes the weak conver... This article introduces the concept of commutative semigroups of almost asymptotically nonexpansive-type mappings in a Banach space X which has the Opial property and whose norm is UKK, and establishes the weak convergence theorems for almostorbits of this class of commutative semigroups. The author improves, extends and develops some recent and earlier results. 展开更多
关键词 semitopological semigroup almost asymptotically nonexpansive type mapping almost orbit asymptotic behavior
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一致凸Banach空间中Lipschitz拓扑半群的不动点定理
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作者 曾六川 杨亚立 《上海师范大学学报(自然科学版)》 1997年第1期16-22,共7页
设C是p一致凸Banach空间E的非空有界闭凸子集,G是半拓扑半群,是C上具有Lipschitz帘数kt,t∈G的Lipschitz半群.假定Kt,t∈G满足适当的附加条件,证明了集合至多是一个单点集,其中,
关键词 半拓扑半群 次平均 p一致凸Banach空间 不动点定理
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