Isomorphisms and automorphisms of quantum groups

Details Isomorphisms and automorphisms of quantum groups Isomorphisms and automorphisms of quantum groups

2009-10-09

arxiv.org/abs/0910.1713v4

Mathematics

Quantum Algebra

This paper has been withdrawn

Scientific paper

We consider isomorphisms and automorphisms of quantum groups. Let $k$ be a field and suppose $p, q\in k^*$ are not roots of unity. We prove that the two quantum groups $U_q(\mathfrak {sl}_2)$ and $U_p(\mathfrak{sl}_2)$ over a field $k$ are isomorphic as $k$-algebras if and only if $p=q^{\pm 1}$. We also rediscover the description of the group of all $k$-automorphisms of $U_q(\mathfrak{sl}_2)$ of Alev and Chamarie, and that $\text{Aut}_k(U_q(\mathfrak {sl}_2))$ is isomorphic to $\text{Aut}_k(U_p(\mathfrak {sl}_2))$.

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