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Record W4413759341 · doi:10.1016/j.laa.2025.08.018

Jordan degree type for codimension three Gorenstein algebras of small Sperner number

2025· article· en· W4413759341 on OpenAlex

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affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.

Bibliographic record

VenueLinear Algebra and its Applications · 2025
Typearticle
Languageen
FieldMathematics
TopicCommutative Algebra and Its Applications
Canadian institutionsQueen's University
FundersSimons Laufer Mathematical Sciences Institute, University of California BerkeleyVetenskapsrådetCalifornia Institute for Regenerative MedicineNational Science Foundation
KeywordsCodimensionMathematicsDegree (music)Pure mathematicsConstant (computer programming)Type (biology)Hilbert series and Hilbert polynomialFunction (biology)Mathematical analysisHilbert space

Abstract

fetched live from OpenAlex

The Jordan type P A , ℓ of a linear form ℓ acting on a graded Artinian algebra A over a field k is the partition describing the Jordan block decomposition of the multiplication map m ℓ , which is nilpotent. The Jordan degree type S A , ℓ is a finer invariant, describing also the initial degrees of the simple submodules of A in a decomposition of A as a direct sum of k [ ℓ ] -modules. The set of Jordan types of A or Jordan degree types (JDT) of A as ℓ varies, is an invariant of the algebra. This invariant has been studied for codimension two graded algebras. We here extend the previous results to certain codimension three graded Artinian Gorenstein (AG) algebras - those of small Sperner number. Given a Gorenstein sequence T - one possible for the Hilbert function of a codimension three graded AG algebra - the irreducible variety Gor ( T ) parametrizes all Gorenstein algebras of Hilbert function T . We here completely determine the JDT possible for all pairs ( A , ℓ ) , A ∈ Gor ( T ) , for Gorenstein sequences T of the form T = ( 1 , 3 , s k , 3 , 1 ) for Sperner number s = 3 , 4 , 5 and arbitrary multiplicity k . For s = 6 we delimit the prospective JDT, without verifying that each occurs.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Theoretical or conceptual · Consensus signal: Theoretical or conceptual
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.083
Threshold uncertainty score0.805

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.001
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.071
GPT teacher head0.343
Teacher spread0.272 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it