Prescribed Tjurina Algebras and Complete Spectra in Osculating-Absorbing Gauss Fibres
Given d >= 1, 1 <= s <= m, N = binom(d+m,d), and any N isolated complex hypersurface germs g_i of order at least s+1, we construct, for every D >= 1 + sum_i(tau(g_i)+2), a smooth integral degree-D hypersurface with a tangent hyperplane whose reduced Gauss fibre has exactly N points, is point-span order-s osculating-absorbing, and has the prescribed completed Tjurina algebras. The fibre length is sum_i tau(g_i), and the dual multiplicity is sum_i mu(g_i). For surfaces, the classical complete Tjurina spectrum of ordinary plane multiple points yields every integer fibre length between binom(m+2,2) floor((3s^2+4s-3)/4) and binom(m+2,2)s^2 at fixed dual multiplicity. We also give a direct strong-Lefschetz proof that x^(s+1)+y^(s+1)+z^(s+1)+(x+y+z)^(s+2) attains Wahl's classical three-variable value s(s+2)(2s-1)/3, producing sharp absorbed threefold fibres. All claims are over C; degree bounds are sufficient, not asserted minimal, and no exhaustive priority or human peer-review claim is made.
Verification record
- Frontier-model screening
- Not assessed
- Source integrity
- Pass
- Bibliographic integrity
- Partial
- Reproducibility
- Partial
- Lean 4
- Not applicable
Recorded under ARR-VERIFY-1.0. ARR verification and screening are not peer review.
Version history
The ARR identifier remains stable. Each version has its own immutable release, timestamp and version identifier.
- v1 · source snapshot available · viewing
AI assistance statement
OpenAI Codex assisted with theorem development, adversarial proof repair, primary-literature and public-corpus triage, exact replay code, drafting, LaTeX production, visual QA, packaging, and deposit preparation. A separate Codex referee task audited an exact final source hash and reported no unresolved mathematical objections. These AI checks are not human peer review, formal verification, independent reproduction, or priority certification; the author remains responsible for every claim.
Frontier-model screening
Status: not_assessed. Any listed reports correspond to this exact version under ARR-SCREEN-1.0; no absent assessment is represented as a pass.
Independent model assessments
No eligible independent ARR-ASSESS-1.0 report is published for this exact version. Missing evidence is not scored as zero.
No model reports are published for this version.
A model assessment is not peer review or a correctness certificate. ARR preserves disagreement, exact-version provenance and later reassessments.
Editorial disclosure
Founder-owned pilot record: the author and editorial signer are the same person. Deposit preserves a citable, reproducible research object but does not constitute independent editorial acceptance or scientific certification.