Chern–Schwartz–MacPherson class conjecture for locally quasi-homogeneous free divisors

Let XX be a locally quasi-homogeneous free divisor in a nonsingular variety VV. Write cSM(1VX)c_{\mathrm{SM}}(1_{V\smallsetminus X}) for the Chern–Schwartz–MacPherson class of the complement, and let ΩV1(logX)\Omega^1_V(\log X) denote the sheaf of differential forms with logarithmic poles along XX. Chern–Schwartz–MacPherson class conjecture. One has

cSM(1VX)=c(ΩV1(logX))[V].c_{\mathrm{SM}}(1_{V\smallsetminus X})=c\bigl(\Omega^1_V(\log X)^\vee\bigr)\cap[V].

This extends the corresponding equality proved in the paper for complements of hyperplane arrangements whose associated affine arrangements are free; the conjecture is proposed as consistent with all known cases, but its general status is not specified in the source.

Sources & referencesView supporting material

Primary source

Paolo Aluffi, “Grothendieck classes and Chern classes of hyperplane arrangements”, arXiv:1103.2777 (2012).

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