Triangular C$^{*}$-bialgebra defined as the direct sum of matrix algebras

Details Triangular C$^{*}$-bialgebra defined as the direct sum of matrix algebras Triangular C$^{*}$-bialgebra defined as the direct sum of matrix algebras

2010-01-12

arxiv.org/abs/1001.1779v1

Mathematics

Operator Algebras

19 pages

Scientific paper

Let $M_{*}({\bf C})$ denote the C$^{*}$-algebra defined as the direct sum of all matrix algebras $\{M_{n}({\bf C}):n\geq 1\}$. It is known that $M_{*}({\bf C})$ has a non-cocommutative comultiplication $\Delta_{\varphi}$. We show that the C$^{*}$-bialgebra $(M_{*}({\bf C}),\Delta_{\varphi})$ has a universal $R$-matrix $R$ such that the quasi-cocommutative C$^{*}$-bialgebra $(M_{*}({\bf C}),\Delta_{\varphi},R)$ is triangular.

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