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Chern classes and transversality for singular spaces
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In this paper we compare different notions of transversality for possible singular complex algebraic or analytic subsets of an ambient complex manifold and prove a refined intersection formula for their Chern-Schwartz-MacPherson classes. In case of a transversal intersection of complex Whitney stratified sets, this result is well known. For splayed subsets it was conjectured (and proven in some cases) by Aluffi and Faber. Both notions are stronger than a micro-local "non-characteristic intersection" condition for the characteristic cycles of (associated) constructible functions, which nevertheless is enough to imply the asked refined intersection formula for the Chern-Schwartz-MacPherson classes. The proof is based the multiplicativity of Chern-Schwartz-MacPherson classes with respect to cross products, as well as a new Verdier-Riemann-Roch theorem for "non-characteristic pullbacks".
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Cited by 2 Pith papers
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Generic pipe dreams, lower-upper varieties, and Schwartz-MacPherson classes
Generic pipe dreams encode the equivariant cohomology classes of lower-upper varieties, unifying classic and bumpless pipe dream formulas and producing new Chern-Schwartz-MacPherson class formulas.
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On the Chern classes of singular complete intersections
For a singular complete intersection X = X1 ∩ ... ∩ Xr in a complex manifold satisfying a transversality condition, the total Milnor class of X is expressed as a combination of the total Milnor and Schwartz-MacPherson...
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