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Account for the outer face in the Heawood face-sum identity

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The bounded-face sum omits the outer face at outer-boundary vertices, so
restrict the gluing identity to interior vertices (where all cluster
interfaces live) and recover a colouring by carrying a single +/-1 label
on the unbounded face f_inf, giving Heawood's identity on the full cubic
dual for the Tait step.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
didericis
2026-06-17 01:33:07 -04:00
parent c5f81842c7
commit 351ae0cdfe
4 changed files with 56 additions and 42 deletions
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papers/heawood_restrictions_on_nested_tire_graph_duals/paper.log
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