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 "provenance": {
  "authors": [
   "@FarLab",
   "@vprusso"
  ],
  "origin": "submission",
  "construction": "Generalized weight-6 form f = 1 + xy + x^-1 y^2, g = 1 + x^-1 y + x^-2 y^-1; open boundaries via annulus-type boundary engine, (11,12) lattice. New instance of the Liang-Eberhardt-Chen open-boundary family (arXiv:2504.08887), outside the paper's enumerated form; the paper's k=6 family stops at [[221,6,10]].",
  "model": "Claude Opus 4.8",
  "date": "2026-06-19",
  "references": [
   "arXiv:2504.08887"
  ],
  "notes": "Distance proven exact by cutoff MILP (scipy/HiGHS); no lighter logical exists on either side."
 },
 "family": "bivariate-bicycle"
}