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THE INTEGRAL COHOMOLOGY OF THE HILBERT SCHEME OF TWO POINTS

Part of: Cycles and subschemes Fiber spaces and bundles

Published online by Cambridge University Press:  27 April 2016

BURT TOTARO
BURT TOTARO*
Affiliation:
UCLA Mathematics Department, Box 951555, Los Angeles, CA 90095-1555, USA; totaro@math.ucla.edu

Abstract

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The Hilbert scheme $X^{[a]}$ of points on a complex manifold $X$ is a compactification of the configuration space of $a$ -element subsets of $X$ . The integral cohomology of $X^{[a]}$ is more subtle than the rational cohomology. In this paper, we compute the mod 2 cohomology of $X^{[2]}$ for any complex manifold $X$ , and the integral cohomology of $X^{[2]}$ when $X$ has torsion-free cohomology.

MSC classification

Primary: 14C05: Parametrization (Chow and Hilbert schemes)
Secondary: 55R80: Discriminantal varieties, configuration spaces
Type
Research Article
Information
Forum of Mathematics, Sigma , Volume 4 , 2016 , e8
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Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright
© The Author 2016

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