SilverSight/.openresearch/artifacts/hn_hoffman_bound.json
allaun 54fd228383 fix(adversarial): repair sofa coloring scripts + Hoffman bound
Adversarial review findings and fixes:
- CRITICAL: v3 hash() -> deterministic_seed (SHA-256) for reproducibility
- HIGH: EPS 0.05 -> 1e-5 (5 orders too wide)
- HIGH: L-corridor jump at t=15->16 (dist 1.0) — smoothed rotation at (0.5,0.5)
- HIGH: gerver_like self-intersecting — arcs meet at shared endpoint
- MEDIUM: hammersley gap at arc junction — fixed endpoint alignment
- MEDIUM/HIGH: gerver_like/hammersley now accept q parameter
- LOW: reflect_y -> negate_y rename, dedup rounding consistency
- de Grey 1581-vertex graph constructs correctly (verified: 1581 vertices, 7877 edges)
- Hoffman bound: λ_max=12.09, λ_min=-7.74, χ≥3 (weak bound, expected)

Build: lake build CoreFormalism.CRTSidon (3297 jobs, 0 errors)
2026-07-04 02:04:37 -05:00

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{
"experiment": "hn_hoffman_bound",
"graph": "degrey",
"description": "De Grey G (1581 vertices, 7877 edges)",
"n_vertices": 1581,
"n_edges": 7877,
"lambda_max": 12.091766719308,
"lambda_min": -7.73894638212,
"hoffman_bound": 2.562456453665,
"chi_lower_bound": 3,
"elapsed_s": 0.82,
"timestamp": "2026-07-04T07:04:29Z",
"sha256": "9c1bcd282a8d96b68cce8942b71338e346ac5eda9cb34e1decc4d6d26b3c6aa8"
}