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Discrete Morse theory : ウィキペディア英語版
Discrete Morse theory
Discrete Morse theory is a combinatorial adaptation of Morse theory developed by (Robin Forman ). The theory has various practical applications in diverse fields of applied mathematics and computer science, such as configuration spaces,〔F. Mori and M. Salvetti: ((Discrete) Morse theory for Configuration spaces )〕 homology computation,〔(Perseus ): the Persistent Homology software.〕 denoising,〔U. Bauer, C. Lange, and M. Wardetzky: (Optimal Topological Simplification of Discrete Functions on Surfaces )〕 and mesh compression.〔T Lewiner, H Lopez and G Tavares: (Applications of Forman's discrete Morse theory to topological visualization and mesh compression )〕
==Notation regarding CW complexes==

Let \mathcal be a CW complex. Define the ''incidence function'' \kappa:\mathcal \times \mathcal \to \mathbb in the following way: given two cells \sigma and \tau in \mathcal, let \kappa(\sigma,~\tau) be the degree of the attaching map from the boundary of \sigma to \tau. The boundary operator \partial on \mathcal is defined by
:\partial(\sigma) = \sum_ \in \mathcal
: \sum_) = 0
which is a corollary of the above definition of the boundary operator and the requirement that \partial\circ\partial \equiv 0.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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