Unconditional ideals of finite rank operators II
作者： Asvald Lima , Vegard Lima , Trond A. Abrahamsen
DOI:
关键词: Ideal (ring theory) 、 Span (category theory) 、 Space (mathematics) 、 Codimension 、 Discrete mathematics 、 Mathematics 、 Subspace topology 、 Normed vector space 、 Rank (differential topology) 、 Banach space
摘要: Let E be a subspace of normed space F. It is known that an ideal (resp. u-ideal) in F if and only G for every E?G?F which has finite codimension = 2). We show many cases rank operators larger it 1. In particular, we F(Y,X) W(Y,X**) all Banach spaces Y reflexive T?W(Y,X**), span( F(Y,X),{T}).
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