Complex Interpolation between Hilbert, Banach and Operator Spaces(Memoirs of the American Mathematical Society)

希尔伯特、巴拿赫与算子空间之间的复杂插值

泛函分析

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作      者
出版时间
2010年11月30日
装      帧
平装
ISBN
9780821848425
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页      码
78
开      本
26 cm.
语      种
英文
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图书简介
Motivated by a question of Vincent Lafforgue, the author studies the Banach spaces (X) satisfying the following property: there is a function (varepsilonto Delta_X(varepsilon)) tending to zero with (varepsilon>0) such that every operator (Tcolon L_2to L_2) with (|T|le varepsilon) that is simultaneously contractive (i.e., of norm (le 1)) on (L_1) and on (L_infty) must be of norm (le Delta_X(varepsilon)) on (L_2(X)). The author shows that (Delta_X(varepsilon) in O(varepsilon^alpha)) for some (alpha>0) iff (X) is isomorphic to a quotient of a subspace of an ultraproduct of (theta)-Hilbertian spaces for some (theta>0) (see Corollary 6.7), where (theta)-Hilbertian is meant in a slightly more general sense than in the author’s earlier paper (1979).
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