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arXiv 1105.0867math.OA
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量子卷积代数之间的等距

Isometries between quantum convolution algebras

Matthew Daws, Hung Le Pham

摘要:

给定局部紧量子群$\G_1$和$\G_2$,证明了如果卷积代数$L^1(\G_1)$和$L^1(\G_2)$与代数等距同构,则$\G_1$与$\G_2$或交换子$\G_2'$同构.此外,给定等距代数同构$θ:L^1(\G_2) \rightarrow L^1(\G_1)$,伴随是$L^\infty(\G_1)$与$L^\infty(\G_2)$或其交换子之间的 *-同构,由$L^\infty(\G_2)$的固有群的成员给出的扭曲组成。这扩展了已知的结果卡茨代数(虽然我们的证明有些不同),这反过来又概括了经典的结果文德尔和沃尔特。我们发现,同样的结果适用于等距代数同态之间的量子测度代数(无论是减少或普遍)。本文对C $^*$ -代数量子群的包络von Neumann代数的内蕴群作了一些讨论。

英文摘要:

Given locally compact quantum groups $\G_1$ and $\G_2$, we show that if the convolution algebras $L^1(\G_1)$ and $L^1(\G_2)$ are isometrically isomorphic as algebras, then $\G_1$ is isomorphic either to $\G_2$ or the commutant $\G_2'$. Furthermore, given an isometric algebra isomorphism $θ:L^1(\G_2) \rightarrow L^1(\G_1)$, the adjoint is a *-isomorphism between $L^\infty(\G_1)$ and either $L^\infty(\G_2)$ or its commutant, composed with a twist given by a member of the intrinsic group of $L^\infty(\G_2)$. This extends known results for Kac algebras (although our proofs are somewhat different) which in turn generalised classical results of Wendel and Walter. We show that the same result holds for isometric algebra homomorphisms between quantum measure algebras (either reduced or universal). We make some remarks about the intrinsic groups of the enveloping von Neumann algebras of C$^*$-algebraic quantum groups.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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