2 commits

Author	SHA1	Message	Date
allaunthefox	cd91eca22f	fix: address 3 bugs from spectral codebook review ... Bug 1: Phinary packing not injective (integration_sprint.py) - Old: float accumulation (phinary += c * PHI^(-i)) loses precision - New: integer positional packing with provable injectivity - Integer coefficients: base = max(|coeff|) + 1 - Float coefficients: quantize to 16-bit, pack in base 65536 - Round-trip is now guaranteed injective Bug 2: Torus winding saturates at n >= 65536 (pist_braid_bridge.py) - spiral_to_torus_winding stores b = n//2 as Q16.16, clamps at 32768 - Added spiral_to_torus_winding_safe() with saturation detection - Returns (winding, saturated) tuple so callers can handle overflow - Documented the limitation in docstrings Bug 3: Power iteration non-convergence (pist_braid_bridge.py + MatrixN.lean) - power_iteration_q16 now returns (eigenvalue, converged) tuple - Detects oscillation via Rayleigh quotient stability check - Added exact_eigenvalue_q16() fallback using numpy - compute_pist_spectral auto-falls-back on non-convergence - Lean MatrixN.lean: documented known limitation in docstring All 3 bugs are from the independent review by Claude Fable.	2026-07-01 21:08:41 +00:00
Allaun Silverfox	553e57fe96	feat(integration): full sprint integration test with real quimb TN backend ... - integration_sprint.py: Unified pipeline with inline numba/tqdm stubs - Real quimb TensorNetwork backend verified (not numpy fallback) - Erdos-Renyi G(20, 1/20): 28/28 checks pass across all modes - Cross-mode agreement: CV=0.0000 (perfect agreement) - Phi-corkscrew spiral index: 20121 -> DNA: PZCGB (Hachimoji 8-state) - 4 modes: esp32, photonic, quantum, tensor -- all agree - Auto-OOM fallback for n>20 on memory-constrained systems - Receipt: sprint_receipt.json	2026-06-23 03:54:34 -05:00