A Lefschetz theorem for intersections with projective varieties
Algebraic Geometry
2020-05-22 v1 Algebraic Topology
Number Theory
Abstract
One version of the classical Lefschetz hyperplane theorem states that for a smooth quasi-projective variety of dimension at least , and a general hyperplane section, the resulting map on \'etale fundamental groups is surjective. We prove a generalization, replacing the hyperplane by a general -translate of an arbitrary projective variety: If is a normal quasi-projective variety, is a geometrically irreducible projective variety of dimension at least , and is a general -translate of , then the map is surjective.
Cite
@article{arxiv.2005.10708,
title = {A Lefschetz theorem for intersections with projective varieties},
author = {Aaron Landesman},
journal= {arXiv preprint arXiv:2005.10708},
year = {2020}
}