English

Tame Class Field Theory for Singular Varieties over Algebraically Closed Fields

Algebraic Geometry 2016-01-12 v3

Abstract

Let X be a separated scheme of finite type over an algebraically closed field k and let m be a natural number. By an explicit geometric construction using torsors we construct a pairing between the first mod m Suslin homology and the first mod m tame etale cohomology of X. We show that the induced homomorphism from the mod m Suslin homology to the abelianized tame fundamental group of X mod m is surjective. It is an isomorphism of finite abelian groups if (m, char(k)) = 1, and for general m if resolution of singularities holds over k.

Keywords

Cite

@article{arxiv.1309.4068,
  title  = {Tame Class Field Theory for Singular Varieties over Algebraically Closed Fields},
  author = {Thomas Geisser and Alexander Schmidt},
  journal= {arXiv preprint arXiv:1309.4068},
  year   = {2016}
}

Comments

Revised version, to appear in Documenta Mathematica

R2 v1 2026-06-22T01:28:10.619Z