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

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

cSM(1V∖X)=c(ΩV1(log⁡X)∨)∩[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.

References

Primary source

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

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