English

Minimal log discrepancies of hypersurface mirrors

Algebraic Geometry 2024-01-30 v2

Abstract

For certain quasismooth Calabi-Yau hypersurfaces in weighted projective space, the Berglund-H\"{u}bsch-Krawitz (BHK) mirror symmetry construction gives a concrete description of the mirror. We prove that the minimal log discrepancy of the quotient of such a hypersurface by its toric automorphism group is closely related to the weights and degree of the BHK mirror. As an application, we exhibit klt Calabi-Yau varieties with the smallest known minimal log discrepancy. We conjecture that these examples are optimal in every dimension.

Keywords

Cite

@article{arxiv.2304.13823,
  title  = {Minimal log discrepancies of hypersurface mirrors},
  author = {Louis Esser},
  journal= {arXiv preprint arXiv:2304.13823},
  year   = {2024}
}

Comments

21 pages, v2: final version, to appear in Forum of Math., Sigma