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Tensor products of -weakly closed nest algebra submodules
Authors:Dong Zhe
Affiliation:Department of Mathematics, Zhejiang University, Hangzhou, 310027, People's Republic of China
Abstract:In this paper we prove that for any unital $sigma$-weakly closed algebra $mathcal A$ which is $sigma$-weakly generated by finite-rank operators in $mathcal A$, every $sigma$-weakly closed $mathcal A$-submodule has $Property; S_{sigma}$. In the case of nest algebras, if $mathcal L_{1},cdots,mathcal L_{n}$ are nests, we obtain the following $n$-fold tensor product formula:

begin{displaymath}mathcal U_{phi_{1}}{overline{otimes}}cdots{overline{ot... ...{phi_{n}}= mathcal U_{phi_{1}otimescdots otimesphi_{n}},end{displaymath}

where each $mathcal U_{phi_{i}}$ is the $sigma$-weakly closed Alg $mathcal L_{i}$-submodule determined by an order homomorphism $phi_{i}$ from $mathcal L_{i}$ into itself.

Keywords:$Property   S_{sigma}$, tensor product, slice map
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