Angle–Slack Accounting and Minimality Heuristics for Triangle-to-Square Dissections

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Autore principale: Bailey, William
Natura: Recurso digital
Lingua:inglese
Pubblicazione: Zenodo 2026
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_version_ 1866901889824587776
author Bailey, William
author_facet Bailey, William
contents <p>This note introduces an angle–slack bookkeeping framework for planar dissections, encoding local angle constraints via a typed cut graph. Interior “slack” vertices represent degrees of freedom that cannot be eliminated under local moves but may be transported through junctions. The framework explains persistent obstructions in three-piece dissections of an equilateral triangle to a square and clarifies why four pieces form the minimal entropy sink. Beyond classical dissection puzzles, the method illustrates a general invariant-based approach relevant to rigidity, obstruction theory, curvature accounting, and scissors congruence.</p> <p>This work was developed through interactive collaboration between William M. Bailey III and ChatGPT (GPT-5.2 Thinking). The framework and exposition emerged via iterative human–AI co-reasoning.</p>
format Recurso digital
id zenodo_https___doi_org_10_5281_zenodo_18253996
institution Zenodo
language eng
publishDate 2026
publisher Zenodo
record_format zenodo
spellingShingle Angle–Slack Accounting and Minimality Heuristics for Triangle-to-Square Dissections
Bailey, William
geometry; dissections; rigidity; obstruction theory; angle deficits; scissors congruence; Gauss–Bonnet; combinatorial topology; mathematical invariants
<p>This note introduces an angle–slack bookkeeping framework for planar dissections, encoding local angle constraints via a typed cut graph. Interior “slack” vertices represent degrees of freedom that cannot be eliminated under local moves but may be transported through junctions. The framework explains persistent obstructions in three-piece dissections of an equilateral triangle to a square and clarifies why four pieces form the minimal entropy sink. Beyond classical dissection puzzles, the method illustrates a general invariant-based approach relevant to rigidity, obstruction theory, curvature accounting, and scissors congruence.</p> <p>This work was developed through interactive collaboration between William M. Bailey III and ChatGPT (GPT-5.2 Thinking). The framework and exposition emerged via iterative human–AI co-reasoning.</p>
title Angle–Slack Accounting and Minimality Heuristics for Triangle-to-Square Dissections
topic geometry; dissections; rigidity; obstruction theory; angle deficits; scissors congruence; Gauss–Bonnet; combinatorial topology; mathematical invariants
url https://doi.org/10.5281/zenodo.18253996