22 citations · 22 across the 3 of their papers we have counts for
3 papers
math.RA2008
The Dixmier-Moeglin equivalence for twisted homogeneous coordinate rings
J. Bell, D. Rogalski, S. J. Sierra
Given a projective scheme over a field , an automorphism of , and a -ample invertible sheaf , one may form the twisted homogeneous coordinate ring $B = B(X, L,…
math.RA2007★ 22 cited
Rings graded equivalent to the Weyl algebra
Susan J. Sierra
We consider the first Weyl algebra, A, in the Euler gradation, and completely classify graded rings B that are graded equivalent to A: that is, the categories gr-A and gr-B are equ…
math.AG2007
A general homological Kleiman-Bertini theorem
Susan J. Sierra
Let G be a smooth algebraic group acting on a variety X. Let F and E be coherent sheaves on X. We show that if all the higher Tor sheaves of F against G-orbits vanish, then for gen…