didericis
753af5ffae
- Conjecture 3.6: add the 4-edge-face criterion as clause (3), with empirical table through n=21 (complete, 535,182/535,182 pass) plus partial n=22 (641,700 colourings, timed out). - Conjecture 3.8: strengthening with clause (4) on the b,c-Kempe cycle / 3-colour alternative on the new face f_n; existential at the witness level. Tested through n=18 (13,800/13,800 pass). - Definition + figure for cubic-graph edge contraction (delete edge, smooth the resulting degree-2 endpoints; equivalent to simple contraction in the dual). - Theorem: cubic contraction across a 4-face preserves 3-edge-colourability when the two opposite boundary edges have different colours. Constructive proof: the two smoothed-in edges inherit the colour of the w_i pair they absorb, and e_1 is recoloured to the third colour. - Add 2-panel illustration of the theorem's recolouring. - Trim Remark 3.7 and 3.9 tables to fit within \textwidth. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
math-research
Personal mathematics research repository by Eric Bauerfeld. Papers are written in AMS-LaTeX using the amsart document class.
Papers
kempe_style_search_for_smaller_contradiction
Humans Suffice: A Novel Proof of the Four Color Theorem
An in-progress proof of the Four Color Theorem via a minimal counterexample argument. The paper builds on Kempe's 1879 strategy — establishing valid cases for vertices of degree ≤ 4, then extending the argument to the degree-5 case using properties of non-adjacent degree-5 vertices, merged subgraphs, and locked colorings.
plane_depth_labelling
Plane Depth Labelling
Early-stage paper. Title and author information set; content in progress.
Creating a New Paper
Use run.sh to scaffold a new paper from the AMS-LaTeX template:
./run.sh init_paper "Your Paper Title"
This creates a new directory (name derived from the title) containing a paper.tex pre-filled with the title and author.
Setup
The Python library code in lib/ requires SageMath. Run setup once per machine:
./run.sh setup <sage_python_path> <sage_site_packages> [system_name]
sage_python_path— path to the SageMath Python interpreter (e.g./opt/sage/local/bin/python3)sage_site_packages— path to SageMath's site-packages directorysystem_name— optional label for this machine (defaults tohostname -s); used to store per-machine env files as.env.<system_name>
On subsequent runs the paths default to whatever was saved in .env, so ./run.sh setup alone re-runs setup with the existing configuration.
Setup also compiles the plantri submodule via make.
Running Sage
To run a Sage script with plantri available on PATH:
./run.sh sage <script.py> [args...]
Or to open an interactive Sage session:
./run.sh sage
Linting
./run.sh lint
Runs pyright and pylint on lib/ using the SageMath Python interpreter.
Shell Completion
To enable tab-completion for run.sh in zsh, add this to your .zshrc:
eval "$(path/to/run.sh completion)"
Or source it once in the current shell session:
eval "$(./run.sh completion)"
Building
Papers are compiled with LaTeX. From within a paper directory:
latexmk -pdf paper.tex