Laurent inversion
File(s)inversion.pdf (688.15 KB)
Accepted version
Author(s)
Coates, Tom
Kasprzyk, Alexander
Prince, Thomas
Type
Journal Article
Abstract
We describe a practical and effective method for reconstructing the
deformation class of a Fano manifold X from a Laurent polynomial f that
corresponds to X under Mirror Symmetry. We explore connections to nef
partitions, the smoothing of singular toric varieties, and the construction of
embeddings of one (possibly-singular) toric variety in another. In particular,
we construct degenerations from Fano manifolds to singular toric varieties; in
the toric complete intersection case, these degenerations were constructed
previously by Doran--Harder. We use our method to find models of orbifold del
Pezzo surfaces as complete intersections and degeneracy loci, and to construct
a new four-dimensional Fano manifold.
deformation class of a Fano manifold X from a Laurent polynomial f that
corresponds to X under Mirror Symmetry. We explore connections to nef
partitions, the smoothing of singular toric varieties, and the construction of
embeddings of one (possibly-singular) toric variety in another. In particular,
we construct degenerations from Fano manifolds to singular toric varieties; in
the toric complete intersection case, these degenerations were constructed
previously by Doran--Harder. We use our method to find models of orbifold del
Pezzo surfaces as complete intersections and degeneracy loci, and to construct
a new four-dimensional Fano manifold.
Date Issued
2019-12-01
Date Acceptance
2019-06-11
Citation
Pure and Applied Mathematics Quarterly, 2019, 15 (4), pp.1135-1179
ISSN
1558-8599
Publisher
International Press
Start Page
1135
End Page
1179
Journal / Book Title
Pure and Applied Mathematics Quarterly
Volume
15
Issue
4
Copyright Statement
© 2019 The Authors.
Sponsor
Commission of the European Communities
Engineering & Physical Science Research Council (EPSRC)
Engineering & Physical Science Research Council (EPSRC)
Commission of the European Communities
The Royal Society
The Royal Society
Identifier
http://arxiv.org/abs/1707.05842v1
Grant Number
240123
DPF2015-P60059-Prince
EP/N03189X/1
682603
516002.K5822/kk
UF090056
Subjects
math.AG
math.AG
14J33 (Primary), 14J45, 52B20 (Secondary)
Notes
29 pages, 16 figures. This supersedes our earlier preprint with the same name (arXiv:1505.01855 [math.AG]). The new version is much more systematic, and works beyond the toric complete intersection case; it also draws connections to the work of Doran--Harder on amenable collections and Batyrev--Borisov on nef partitions
Publication Status
Published
Date Publish Online
2020-03-20