Fredricksen and Sweet (2000), Constructions, printed partition of 536; project package schur6-536-reproduction.zip SHA-256 bf017ebcc8d53d2938de89ceb1abdd3e4bbf2b2f3e10d3598ea602e45986e20b; source JSON SHA-256 423b50378ca8c09b5909c244216a857b30d577ff6bef6e98635329ff432e0912; python verify.py returned PASS on 2026-10-08. audit-exact32.md independently reconstructed the finite check from the JSON but not the source transcription.
范围
This one published six-color partition of the finite interval 1..536. It establishes only the already known lower bound S(6)≥536.
假设
Sum-free means no x+y=z within one color class, including x=y. Symmetry expansion about 537 uses the explicit 179/358 exception in the printed certificate.
工具链
Python 3.12; direct exhaustive triple enumeration.
审查者
Internal AI-assisted computational check; no external reviewer.
verify.py counts disjoint same-color 537-pairs by color: 64,43,55,38,32,35. Thus <=32 changes forces color 5 at 537 and one changed endpoint of each of its 32 pairs. search-notes.md gives ten fixed-entry triples blocking every alternative color for both endpoints of (9,528); exact32.py checks this obstruction and returns radius_32_shell_excluded=true. audit-exact32.md records an independent internal AI reconstruction on 2026-10-08. Package SHA-256 bf017ebcc8d53d2938de89ceb1abdd3e4bbf2b2f3e10d3598ea602e45986e20b.
范围
Hamming distance from the exact labeled Fredricksen–Sweet partition of 1..536 to any valid 537-coloring. This does not exclude more distant six-colorings of 1..537 or imply S(6)=536. No publication-priority claim.
假设
Six labeled colors; sum-free forbids x+y=z including x=y. At most 32 of the first 536 entries are recolored relative to the published certificate.
工具链
Python 3.12; direct pair enumeration and fixed-triple obstruction check; no formal proof assistant.
审查者
Independent internal AI mathematical audit, 2026-10-08; no external or peer reviewer.
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