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An integral form of the quantized enveloping algebra of sl2 and its completions

Kazuo Habiro

math.QAarXiv:math/0605313

Abstract

We introduce an integral form U of the quantized enveloping algebra of sl2. The algebra U is just large enough so that the quasi-R-matrix is contained in a completion of U U. We study several completions of the algebra U, and determine their centers. This study is motivated by a study of integrality properties of the quantum sl2 invariants of links and integral homology spheres.

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