T-076: Linear-measure lower bound replayed at
V3 C3 lower bound confirmed
A measure of points, segments and rectangles that wand125/square-packing-bounds published on 2 October 2026 proves = 9.32. The measure is of the kind and checker of T-073: point masses, segments of uniform density and rectangles of uniform density, in D4 orbits with exact rational geometry, of total mass 82 - 1/100000, at core side 9977/10000 on 201 net half-angles of step 83/40000, with 86 point, 222 segment and 774 rectangle orbits. They are those of T-073's certificate, every coordinate scaled by exactly 932/935, with the masses solved again.
The source reports it accepted at all 201 net angles, the axis included, by code/unified_linear_verify.cpp, byte for byte the verifier of T-073, in 153,579,479 nodes, and says the full replay was run again from the published tarball by the same implementation. The value exceeds Green's reported 2 sqrt(2) + (247 + 12 sqrt(2))/41 = 9.2667335..., the value this record reported at , by 0.0532664..., and does not rest on Green's argument, which jlevy/squares#308 reports the published material does not establish for k >= 4. Its mass is below 83, where T-075's 937/100 is higher.
It passed a complete replay here on 3 October 2026 of the source's unchanged checker and replay functions on its pinned tarball: all 201 directions, each returning the certificate's own record. The replay runs the source's own algorithm and is not an independent decision of coverage.
wand125 after Tokoharu and Levy, square-packing-bounds. Registration was requested in a comment of 2 October 2026 on jlevy/squares#294. The source says parts of the work were produced with AI assistance under human direction.
Significance, composition and next rung
- Significance
- Raised the verified lower bound at from Nagamochi's closed form past Green's reported value, the one count from 82 to 85 where the record still reported Green's value, by a certificate of T-073's kind that does not rest on Green's argument. A further size from one generator and checker, at S3 as T-073 is; the 2 October review of the afternoon certificates proposed S3, which the replay leaves standing. Nagamochi's closed form has been a reported bound since Karakuş's finding (T-085, merged 2026-10-03); on the merged record the verified floor this replay raised at was Karakuş's general bound (T-083), lower still.
- Composition
- One claim from one certificate, on its reported entry and its replay entry. The replay runs the source's C++ checker unchanged: one interval-certified method, replayed here, C3. Coverage is decided by that checker alone, which the 2 October review of the linear certificates read function by function.
- Next rung
- V4 and C4 need two adversarial AI reviews by distinct reviewers and a human oversight record; the review of these certificates was the retaining lane's own, and the checker's separately prompted review is T-073's. A second machine method would be a method-distinct decision of rotated coverage for a linear measure; the replay here runs the source's own checker. linear-control n82 would put a negative control on this certificate itself; the checker's controls are 's.
- Novelty
- previously-published Present in an identified source
The case
Results on the case
5 results in the register on , oldest first, each with what it established and how it stands now.
2005 published T-007
for
V0 C1 lower bound incomplete on this case, superseded by T-076
Nagamochi · Nagamochi 2005 · source · register
2026-09-04 published T-085
Nagamochi 2005, Lemma 1 is false for every container with and
V3 C3 correction confirmed
Karakuş; chelokot · Karakuş 2026 · chelokot Nagamochi counterexample 2026 · packet · register
2026-09-29 published T-058
Rectangle-certificate ceiling
α·UB(n)proved for ..100;B·UB(n)on 64 grid rowsV3 C3 method limit confirmed
wand125 after Tokoharu, Daniel · wand125 tools 2026 · packet · register
2026-09-29 published T-083
for every nonsquare
V3 C3 lower bound confirmed on this case, superseded by T-076
Karakuş · Karakuş 2026 · source · register
2026-10-02 published T-076 this result
Linear-measure lower bound replayed at
V3 C3 lower bound confirmed
wand125 after Tokoharu, Levy, Stromquist, Nagamochi, Burns, Massaccesi · wand125 linear n82 2026-10-02 · packet · source · review · register
Links
- On this site
- Case record, · Frontier row, · T-076 in the results table
On GitHub, at main
- Register
- T-076 in
results.yaml, line 7140 - Evidence
E-n082-wand125-linear-932-report·E-n082-wand125-linear-932-source-replay- Proofs and certificates
- certificate
candidate.json.gz· proofcontinuous-density-certificate.ja.md· auditreview-2026-10-02-wand125-linear-certificates-and-n76.md - Sources
- wand125 linear n82 2026-10-02 (its own site, retained copy)
- Source packet
resources/web/wand125-linear-n82-2026-10-02/README.md- Artifacts
8 artifacts and controls
resources/web/wand125-linear-n82-2026-10-02/README.mdresources/web/wand125-linear-n82-2026-10-02/receipts/linear-audit.jsonresources/web/wand125-linear-n82-2026-10-02/receipts/n82/merged.jsondevtools/audit_wand125_linear.pydocs/project/reviews/review-2026-10-02-wand125-afternoon-certificates.mddocs/project/reviews/review-2026-10-02-wand125-linear-certificates-and-n76.mdresources/web/wand125-linear-certificates-2026-10-02/receipts/n101/control.jsontests/test_wand125_linear_certificates.py- Case file
frontier/n-082.md(verified lower, verified upper, reported lower, reported upper)