منابع مشابه
Contractive Projections on Banach Spaces
Increasing sequences of contractive projections on a reflexive LP space share an unconditionality property similar to that exhibited sequences of self-adjoint projections on a Hilbert space. A slight variation of this property is shown to be precisely the correct condition on a reflexive Banach space to ensure that every operator with a contractive AC-functional calculus is scalar-type spectraL
متن کاملRanges of Positive Contractive Projections in Nakano Spaces
We show that in any nontrivial Nakano space X = Lp(·)(Ω, Σ, μ) with essentially bounded random exponent function p(·), the range Y = R(P ) of a positive contractive projection P is itself representable as a Nakano space LpY (·)(ΩY , ΣY , νY ), for a certain measurable set ΩY ⊆ Ω (the support of the range), a certain sub-sigma ring ΣY ⊆ Σ (with maximal element ΩY ) naturally determined by the la...
متن کاملFixed point theorems under Hardy-Rogers contractive conditions on 0-complete ordered partial metric spaces
*Correspondence: [email protected] 4Department of Mathematics, Kyungnam University Masan, Kyungnam, 631-701, Korea Full list of author information is available at the end of the article Abstract A fixed point theorem is obtained for a monotone self-map in a 0-complete ordered partial metric space under Hardy-Rogers-type contractive condition. This result improves some recently obtained on...
متن کاملImages of contractive projections on operator algebras
It is shown that if P is a weak∗-continuous contractive projection on a JBW∗-triple M , then P(M) is of type I or semifinite, respectively, if M is of the corresponding type. We also show that P(M) has no infinite spin part if M is a type I von Neumann algebra. 2002 Elsevier Science (USA). All rights reserved.
متن کاملFixed Point of T-Hardy-Rogers Contractive Mappings in Partially Ordered Partial Metric Spaces
Copyright q 2012 Mujahid Abbas et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. We prove some fixed point theorems for a T-Hardy-Rogers contraction in the setting of partially ordered partial metric spaces. We apply our resu...
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ژورنال
عنوان ژورنال: Studia Mathematica
سال: 2005
ISSN: 0039-3223,1730-6337
DOI: 10.4064/sm171-1-5