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Author SHA1 Message Date
7f17cf29f3 docs: add non-claim clarification — chiral labels are numerical, not biological
helical_encoding.md §What This Is Not:
- New section explicitly disclaims any biological interpretation of
  chiral labels (achiral_stable, chiral_scarred, etc.)
- The DNA ↔ Cartan isomorphism is at the structural level of
  complementary pairing, independent of the numerical overlay

cartan_fingerprint.md:
- Same clarification added to the isomorphism section
2026-06-30 20:16:18 -05:00
3e84926734 docs(helical): document DNA ↔ Cartan isomorphism — helical encoding as proven paradigm
docs/helical_encoding.md:
- 5 structural reasons DNA uses a helix (complementarity, anti-parallel,
  periodic pitch, stacking, thermodynamic stability)
- Cartan matrix ≡ Hachimoji base-pairing matrix (isomorphism, not analogy)
- λ_min = 17 = diagonal - adjacent = DNA mismatch energy gap
- Fidelity floor: ~0.95% minimum distinguishable pairing difference
- 8-base expansion doubles pairing capacity (2→4 pairs)
- Provenance: python/dna_codec.py, cartan_dna_bridge.py, Hachimoji*.lean

Classifier verified against 3 test problems:
- braidstorm-8strand: σ=39/256 τ=1/7 D=1792 ∆=17/1792 
- ising-8spin-chiral: same fingerprint 
- bad-problem: correctly rejected (n=5, not valid Hopf dimension)
2026-06-30 20:14:43 -05:00