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4 papers · 1 filter
Closures of Steinberg fibers in twisted wonderful compactifications
Xuhua He, Jesper Funch Thomsen
By a case-free approach we give a precise description of the closure of a Steinberg fiber within a twisted wonderful compactification of a simple linear algebraic group. In the non…
On the intersection theory of the moduli space of rank two bundles
Alina Marian, Dragos Oprea
We give an algebro-geometric derivation of the known intersection theory on the moduli space of stable rank 2 bundles of odd degree over a smooth curve of genus g. We lift the comp…
Bounding solutions of Pfaff equations
E. Esteves, S. Kleiman
Let ωbe a Pfaff system of differential forms on a projective space. Let S be its singular locus, and Y a solution of ω=0. We prove Y\cap S is of codimension at most 1 in Y, just as…
Finiteness of rigid cohomology with coefficients
Kiran S. Kedlaya
We prove that for any field k of characteristic p>0, any separated scheme X of finite type over k, and any overconvergent F-isocrystal E over X, the rigid cohomology H^i(X, E) and…