Exchange between perverse and weight filtration for the Hilbert schemes of points of two surfaces     Exchange  perverse  weight filtration  Hilbert schemes  points of two surfaces       font style='font-size:12px;'> 2011/1/21

We show that a natural isomorphism between the rational cohomology groups of the two zero-dimensional Hilbert schemes of n-points of two surfaces, the affine plane minus the axes and the cotangent bun...

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Heisenberg categorification and Hilbert schemes      Heisenberg categorification  Hilbert schemes        font style='font-size:12px;'> 2010/12/13

Given a finite subgroup 􀀀  SL2(C) we define an additive 2-category H􀀀 whose Grothendieck group is isomorphic to an integral form h􀀀 of the Heisenberg algebra. We construct...

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