Biquantization of Lie bialgebras

Details Biquantization of Lie bialgebras Biquantization of Lie bialgebras

1998-10-02

arxiv.org/abs/math/9810009v1

Pacific J. Math. 195:2 (2000), 297-369

Mathematics

Quantum Algebra

67 pages, no figures

Scientific paper

For any finite-dimensional Lie bialgebra $g$, we construct a bialgebra $A_{u,v}(g)$ over the ring $C[u][[v]]$, which quantizes simultaneously the universal enveloping bialgebra $U({g})$, the bialgebra dual to $U(g^*)$, and the symmetric bialgebra $S(g)$. We call $A_{u,v}(g)$ a biquantization of $S(g)$. We show that the bialgebra $A_{u,v}(g^*)$ quantizing $U(g^*)$, $U(g)^*$, and $S(g^*)$ is essentially dual to the bialgebra obtained from $A_{u,v}(g)$ by exchanging $u$ and $v$. Thus, $A_{u,v}(g)$ contains all information about the quantization of $g$. Our construction extends Etingof and Kazhdan's one-variable quantization of $U(g)$.

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