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arXiv:math/0507029 [math.AG]AbstractReferencesReviewsResources

Limits of Chow groups, and a new construction of Chern-Schwartz-MacPherson classes

Paolo Aluffi

Published 2005-07-01, updated 2006-05-19Version 2

We define an `enriched' notion of Chow groups for algebraic varieties, agreeing with the conventional notion for complete varieties, but enjoying a functorial push-forward for arbitrary maps. This tool allows us to glue intersection-theoretic information across elements of a stratification of a variety; we illustrate this operation by giving a direct construction of Chern-Schwartz-MacPherson classes of singular varieties, providing a new proof of an old (and long since settled) conjecture of Deligne and Grothendieck.

Comments: 23 pages, final version. Dedicated to Robert MacPherson on the occasion of his 60th birthday
Journal: Pure Appl. Math. Q. 2 (2006), no. 4, part 2, 915-941
Categories: math.AG
Subjects: 14C17, 57D20
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