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向量值空间中的几何酉元

Geometric Unitaries in Vector-Valued Function Spaces
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摘要 研究向量值空间中的几何酉元.通过数值指标理论刻画向量值空间C(Ω,X),L_∞(μ,X)和L(l_1(Γ),X)中几何酉元的特征,其中X是Banach空间,Ω是紧Hausdorff空间,μ是σ有限测度以及Γ是非空指标集.同时,描述了Banach空间的内射张量积和投射张量积中几何酉元的特征. We study the geometric unitaries in vector-valued function spaces.By using numerical index theory,we characterize the geometric unitaries in the spaces C(Ω,,X) on a compact Hausdorff space Ω,L_∞(μ,X) for every σ-finite measure μ and L(l_1(Γ),X) for every nonempty index set Γ.We also describe the geometric unitaries in the injective and projective tensor product of Banach spaces.
出处 《数学学报(中文版)》 CSCD 北大核心 2015年第6期1001-1008,共8页 Acta Mathematica Sinica:Chinese Series
基金 国家自然科学基金(11201337 11201338 11371201 11301384) 天津市教委资助项目(20111001)
关键词 几何酉元 数值指标 数值域空间 geometric unitary numerical index numerical range space
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参考文献17

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