Add diagrams of the six witness Even Level Graphs and their bridge switches

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Figure fig:n21-witnesses: each of the six Holton-McKay duals drawn as its
witness Even Level Graph in a radial-by-level layout (source centre,
level-k vertices on ring k), coloured by parity. Dashed red edges are the
flipped same-parity edges and solid green edges the introduced bridges;
applying the switches yields the dual. Duals 1,2 are ELGs outright.

draw_witnesses.py generates the combined 2x3 figure and per-dual PNGs from
the verified witness JSONs.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

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didericis

2026-05-22 11:16:33 -04:00

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papers/even_level_graph_generators/paper.pdf

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