HOẠT ĐỘNG TRONG TUẦN

Newton nondegenerate Weil divisors in toric varieties
Báo cáo viên: Baldur Sigurðsson (Simons Postdoc)

Thời gian: 09h Thứ 4, ngày 14/07/2021

Địa điểm: P304 nhà A5

Tóm tắt: We introduce Newton nondegenerate Weil divisors in toric affine varieties and present formulas for their geometric genus, canonical divisors, and provide conditions on their Newton polyhedron to be Gorenstein. We prove that if such a Weil divisor of dimension 2 is normal and Gorenstein, and the link is a rational homology sphere, then the geometric genus is given by the minimal path cohomology, a topological invariant.
This is joint work with András Némethi, based on the article arXiv:2102.02948.

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