Rational cohomology tori
Algebraic Geometry
2017-03-29 v1
Abstract
We study normal compact K\"ahler spaces whose rational cohomology ring is isomorphic to that of a complex torus. We call them rational cohomology tori. We classify, up to dimension three, those with rational singularities. We then give constraints on the degree of the Albanese morphism and the number of simple factors of the Albanese variety for rational cohomology tori of general type (hence projective) with rational singularities. Their properties are related to the birational geometry of smooth projective varieties of general type, maximal Albanese dimension, and with vanishing holomorphic Euler characteristic. We finish with the construction of series of examples.
Cite
@article{arxiv.1509.01043,
title = {Rational cohomology tori},
author = {Olivier Debarre and Zhi Jiang and Martí Lahoz and William F. Sawin},
journal= {arXiv preprint arXiv:1509.01043},
year = {2017}
}
Comments
Appendix by William F. Sawin