Expanding \v{C}ech cohomology for quantales
Abstract
We expand \v{C}ech cohomology of a topological space with values in a presheaf on to \v{C}ech cohomology of a commutative ring with unity with values in a presheaf on . The strategy is to observe that both the set of open subsets of and the set of ideals of provide examples of a (semicartesian) quantale. We study a particular pair of (adjoint) functors between the quantale of open subsets of and the quantale of ideals of , the ring of real-valued continuous functions on . This leads to the main result of this paper: the th \v{C}ech cohomology groups of with values on the constant sheaf on is isomorphic to the th \v{C}ech cohomology groups of the ring with values on a sheaf on .
Cite
@article{arxiv.2404.12884,
title = {Expanding \v{C}ech cohomology for quantales},
author = {Ana Luiza Tenório and Peter Arndt and Hugo Luiz Mariano},
journal= {arXiv preprint arXiv:2404.12884},
year = {2024}
}
Comments
20 pages. We have removed one of the examples and the notion of a "basis" for a quantale; we will discuss them elsewhere with more details