Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4584096 | Journal of Algebra | 2015 | 31 Pages |
Abstract
We classify central extensions of a reductive group G by K3 and BK3, the sheaf of third Quillen K-theory groups and its classifying stack. These turn out to be parametrized by the group of Weyl-invariant quadratic forms on the cocharacter lattice valued in kà and the group of integral Weyl-invariant cubic forms on the cocharacter lattice respectively.
Keywords
Related Topics
Physical Sciences and Engineering
Mathematics
Algebra and Number Theory
Authors
Pavel Safronov,