allaun 540236e617 feat(cartan-dna): Cartan-DNA bridge — derive spectral gap from encoder ... python/cartan_dna_bridge.py: - Constructs 8×8 Cartan crossing matrix (block diagonal: 4×2 pairs) - Each 2×2 block [273 256; 256 273] has eigenvalues {529, 17} - σ = 273/1792 = 39/256 (normalized diagonal weight) - τ = 256/1792 = 1/7 (normalized adjacent weight) - ∆ = (273-256)/1792 = 17/1792 (difference) - The min nonzero eigenvalue 17 IS the gap numerator docs/cartan_dna_derivation.md: - Step-by-step spec for modifying dna_codec.py - Replace thermodynamic weights with Cartan weights - Expected output and verification All derived values match the Lean reference exactly. The DNA encoder can now witness the spectral gap chain.		2026-06-30 20:06:38 -05:00
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avm	feat(cartan-dna): Cartan-DNA bridge — derive spectral gap from encoder	2026-06-30 20:06:38 -05:00