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arXiv · 2508.14103

A Morse Mayer-Vietoris Sequence for Cosheaf Homology on Simplicial Complexes

Ben H. Gould
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Abstract

We investigate the homology of cosheaves over finite simplicial complexes. After constructing the Mayer-Vietoris short exact sequence for this homology theory, we apply discrete Morse theory to this setting, defining the associated Morse chain complex. The main result is the construction of a Morse Mayer-Vietoris short exact sequence of Morse chain complexes, for which we establish a quasi-isomorphism to the standard Mayer-Vietoris sequence. Discussions relating poset-based (co)sheaf definitions to topological ones via Kan extensions and exploring a modern categorical perspective on discrete Morse theory are also included.

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BibTeXRIS

Ben H. Gould. 2025-08-16. A Morse Mayer-Vietoris Sequence for Cosheaf Homology on Simplicial Complexes. https://arxiv.org/abs/2508.14103

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