Abstract
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“.
Dedicated to Pepe Seade on his 60th birthday
Mathematics Subject Classification (2000). 14C17, 14C40, 32S60.
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© 2017 Springer International Publishing Switzerland
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Schürmann, J. (2017). Chern Classes and Transversality for Singular Spaces. In: Cisneros-Molina, J., Tráng Lê, D., Oka, M., Snoussi, J. (eds) Singularities in Geometry, Topology, Foliations and Dynamics. Trends in Mathematics. Birkhäuser, Cham. https://doi.org/10.1007/978-3-319-39339-1_13
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DOI: https://doi.org/10.1007/978-3-319-39339-1_13
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Publisher Name: Birkhäuser, Cham
Print ISBN: 978-3-319-39338-4
Online ISBN: 978-3-319-39339-1
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