Stacky abelianization of algebraic groups |
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Authors: | Masoud Kamgarpour |
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Institution: | 1. Department of Mathematics, University of British Columbia, Vancouver, BC, V6T 1Z2, Canada
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Abstract: | We prove a conjecture of Drinfeld regarding restriction of central extensions of an algebraic group G to the commutator subgroup. As an application, we construct the “true commutator” of G. The quotient of G by the action of the true commutator is the universal commutative group stack to which G maps. |
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