Quantized hyperalgebras of rank 1

Details Quantized hyperalgebras of rank 1 Quantized hyperalgebras of rank 1

2004-03-08

arxiv.org/abs/math/0403144v1

Mathematics

Quantum Algebra

Scientific paper

We study the algebra $U_{\zeta}$ obtained via Lusztig's `integral' form [Lu 1, 2] of the generic quantum algebra for the Lie algebra $\frak {g=sl}_2$ modulo the two-sided ideal generated by $K^l-1$. We show that $U_{\zeta}$ is a smash product of the quantum deformation of the restricted universal enveloping algebra $\bold u_{\zeta}$ of $\frak g$ and the ordinary universal enveloping algebra $U$ of $\frak g$, and we compute the primitive (= prime) ideals of $\Uz$. Next we describe a decomposition of $\bold u_{\zeta}$ into the simple $U$- submodules, which leads to an explicit formula for the center and the indecomposable direct summands of $\Uz$. We conclude with a description of the lattice of cofinite ideals of $\Uz$ in terms of a unique set of lattice generators.

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