Multiplicative de Rham Theorems for Relative and Intersection Space Cohomology
Abstract
We construct an explicit de Rham isomorphism relating the cohomology rings of Banagl's de Rham and spatial approach to intersection space cohomology for stratified pseudomanifolds with isolated singularities. Intersection space (co-)homology is a modified (co-)homology theory extending Poincar\'e Duality to stratified pseudomanifolds. The novelty of our result compared to the de Rham isomorphism given previously by Banagl is, that we indeed have an isomorphism of rings and not just of graded vector spaces. We also provide a proof of the de Rham Theorem for cohomology rings of pairs of smooth manifolds which we use in the proof of our main result.
Cite
@article{arxiv.1904.00482,
title = {Multiplicative de Rham Theorems for Relative and Intersection Space Cohomology},
author = {Franz Wilhelm Schlöder and J. Timo Essig},
journal= {arXiv preprint arXiv:1904.00482},
year = {2020}
}
Comments
Fixed some typos, the article is now also available on the website of the Journal of Singularities http://www.journalofsing.org/volume19/article7.html