Quasiregular values and cohomology
Differential Geometry
2025-11-06 v1 Complex Variables
Abstract
We prove that the recently shown cohomological obstruction for quasiregular ellipticity has a generalization in the theory of quasiregular values. More specifically, if is a closed, connected, and oriented Riemannian -manifold, and there exists a map satisfying a.e. in with , , and for some , then the real singular cohomology ring of embeds into the exterior algebra in a graded manner. We also show a partial version of our result for with dimension greater than , by using a class of maps that combines properties of quasiregular values and quasiregular curves.
Cite
@article{arxiv.2511.03514,
title = {Quasiregular values and cohomology},
author = {Susanna Heikkilä and Ilmari Kangasniemi},
journal= {arXiv preprint arXiv:2511.03514},
year = {2025}
}
Comments
39 pages, including one 6-page Appendix