Hochschild cohomology and perturbations of Banach algebras

Hochschild cohomology and perturbations of Banach algebras
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Banach 代数的 Hochschild 上同调和微扰

DOI:
10.1016/0022-1236(77)90072-6
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发表时间:
1977
影响因子:
1.7
通讯作者:
Joseph L. Taylor
Joseph L. Taylor
中科院分区:
数学1区
文献类型:
--
作者:
I. Raeburn;Joseph L. Taylor

文献摘要

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设A和B是有单位元的Banach代数,且π:A→是连续同态。得到了π的扰动类似于π的Hochschild上同调的条件。我们还证明了如果A是一个满足H2(A,A)=H3(A,A)=0的Banach代数,则A的乘法的扰动同构于ToA。我们用我们的技巧部分回答了Kadison和Kastler关于算子代数扰动的一些问题。
LetAandBbe Banach algebras with identity and letπ:A→Bbe a continuous homomorphism. We obtain conditions on the Hochschild cohomology ofAunder which perturbations of π are similar to π. We also show that ifAis a Banach algebra such thatH2(A,A) =H3(A,A) = 0, then perturbations of the multiplication ofAgive algebras isomorphic toA. We use our techniques to partially answer some problems of Kadison and Kastler on perturbations of operator algebras.