Topological properties of punctual Hilbert schemes of almost-complex fourfolds (II)

Details Topological properties of punctual Hilbert schemes of almost-complex fourfolds (II) Topological properties of punctual Hilbert schemes of almost-complex fourfolds (II)

2010-01-02

arxiv.org/abs/1001.0119v1

Mathematics

Algebraic Geometry

Scientific paper

In this article, we study the rational cohomology rings of Voisin's punctual Hilbert schemes $X^{[n]}$ associated to a symplectic compact fourfold $X$. We prove that these rings can be universally constructed from $H^*(X,\mathbb{Q})$ and $c_1(X)$, and that Ruan's crepant resolution conjecture holds if $c_1(X)$ is a torsion class. Next, we prove that for any almost-complex compact fourfold $X$, the complex cobordism class of $X^{[n]}$ depends only on the cobordism class of $X$.

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