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math.AG2000
The cup product of the Hilbert scheme for K3 surfaces
Manfred Lehn, Christoph Sorger
To any graded Frobenius algebra A we associate a sequence of graded Frobenius algebras A^[n] in such a way that for any smooth projective surface X with trivial canonical divisor t…
math.AG2000
Symmetric groups and the cup product on the cohomology of Hilbert schemes
Manfred Lehn, Christoph Sorger
The integral cohomology ring of the Hilbert scheme of n-tuples on the affine plane is shown to be isomorphic to the graded ring associated to a filtration of the ring of integral c…