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math.AG2012
Characteristic cycles and decomposition numbers
Kari Vilonen, Geordie Williamson
We observe that the characteristic cycle of a D-module gives bounds for decomposition numbers of intersection cohomology complexes.
math.AG2012★ 6 cited
Kumar's criterion modulo p
Daniel Juteau, Geordie Williamson
We prove that equivariant multiplicities may be used to determine whether attractive fixed points on T-varieties are p-smooth. This gives a combinatorial criterion for the determin…