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2105.09870

Morse Theoretic Templates for High Dimensional Homology Computation

Shaun Harker, Konstantin Mischaikow, Kelly Spendlove

correctmedium confidence
Category
Not specified
Journal tier
Specialist/Solid
Processed
Sep 28, 2025, 12:56 AM

Audit review

The paper proves that Mate(·, α) is acyclic on any H_n-embeddable complex via an α-stability/most-preferred-bit zig-zag argument (Theorem 1.2 and its proof, together with the pullback via incidence embeddings and the Mate recursion) . It then assembles fiberwise matchings into a global acyclic matching using the Patchwork Theorem (Theorems 1.3 and 2.12) . The candidate solution proves the same claim by identifying Mate with a lexicographic first-available-coordinate matching on each fiber and invoking Babson–Hersh for acyclicity there, before applying Patchwork. This yields the same conclusion. The only minor imprecision is the statement that w_{≤i} “coincides with α_i on A_{i−1}”; strictly, by the Mate definition (Eqn. (4)), it coincides with α_i only on those elements of A_{i−1} whose mates also lie in A_{i−1} . Otherwise, both arguments are correct and consistent with the paper’s framework.

Referee report (LaTeX)

\textbf{Recommendation:} minor revisions

\textbf{Journal Tier:} specialist/solid

\textbf{Justification:}

The core results are correct, clearly structured, and practically relevant. The Mate algorithm and hypercube templates are well motivated and implemented, with a clean acyclicity argument via stability and a standard graded assembly. Minor clarity improvements (explicitly connecting Mate to lexicographic matching and sharpening the stepwise update description) would make the exposition more accessible to readers familiar with related formulations.