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math.QA2016★ 10 cited
Gauge invariants from the powers of antipodes
Cris Negron, Siu-Hung Ng
We prove that the trace of the th power of the antipode of a Hopf algebra with the Chevalley property is a gauge invariant, for each integer . As a consequence, the order of…
math.RA2016
The derived Picard group of an affine Azumaya algebra
Cris Negron
We describe the derived Picard group of an Azumaya algebra A on an affine scheme X in terms of global sections of the constant sheaf of integers on X, the Picard group of X, and th…