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Smoothing Calabi–Yau toric hypersurfaces using the Gross–Siebert algorithm

Part of: Special varieties Surfaces and higher-dimensional varieties

Published online by Cambridge University Press:  17 June 2021

Thomas Prince
Thomas Prince*
Affiliation:
The Abbey School, Kendrick Road, ReadingRG1 5DZ, [email protected]
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Abstract

We explain how to form a novel dataset of Calabi–Yau threefolds via the Gross–Siebert algorithm. We expect these to degenerate to Calabi–Yau toric hypersurfaces with certain Gorenstein (not necessarily isolated) singularities. In particular, we explain how to ‘smooth the boundary’ of a class of four-dimensional reflexive polytopes to obtain polarised tropical manifolds. We compute topological invariants of a compactified torus fibration over each such tropical manifold, expected to be homeomorphic to the general fibre of the Gross–Siebert smoothing. We consider a family of examples related to products of reflexive polygons. Among these we find $14$ topological types with $b_2=1$ that do not appear in existing lists of known rank-one Calabi–Yau threefolds.

Keywords

Calabi–Yau manifoldstoric degenerations

MSC classification

Primary: 14J32: Calabi-Yau manifolds
Secondary: 14J33: Mirror symmetry 14M25: Toric varieties, Newton polyhedra 14J81: Relationships with physics
Type
Research Article
Information
Compositio Mathematica , Volume 157 , Issue 7 , July 2021 , pp. 1441 - 1491
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Copyright
© The Author(s) 2021

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