Construct Weak Hopf Algebras By Using Borcherds Matrix

Details Construct Weak Hopf Algebras By Using Borcherds Matrix Construct Weak Hopf Algebras By Using Borcherds Matrix

2006-07-13

arxiv.org/abs/math/0607303v1

Mathematics

Quantum Algebra

Scientific paper

We define a new kind quantized enveloping algebra of a generalized Kac-Moody algebra ${\mathcal G}$ by adding a new generator $J$ satisfying $J^m=J$ for some integer $m$. We denote this algebra by $wU_q^{\tau}({\mathcal G})$. This algebra is a weak Hopf algebra if and only if $m=2,3$. In general, it is a bialgebra, and contains a Hopf subalgebra. This Hopf subalgebra is isomorphic to the usually quantum envelope algebra $U_q({\mathcal G})$ of a generalized Kac-Moody algebra ${\mathcal G}$.

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