Parameterization of factorizable line bundles by K-theory and motivic cohomology

preprint2020arXivOpen access

Abstract

This note corrects a certain construction in (the old version of) the paper [GL]. The construction in question starts from a Brylinski-Deligne datum, which is an extension of a group G by K_2, and produces a factorization line bundle on the affine Grassmannian of the group G.

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