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Record W1986270090 · doi:10.1515/forum-2011-0038

Weitzenböck derivations of nilpotency 3

2012· preprint· en· W1986270090 on OpenAlex

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

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

Bibliographic record

VenueForum Mathematicum · 2012
Typepreprint
Languageen
FieldMathematics
TopicAlgebraic structures and combinatorial models
Canadian institutionsRoyal Military College of Canada
Fundersnot available
KeywordsMathematicsConjecturePolynomial ringCombinatoricsPolynomialLocally nilpotentPure mathematicsAlgebra over a fieldNilpotent groupNilpotentMathematical analysis

Abstract

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Abstract We consider a Weitzenböck derivation Δ acting on a polynomial ring <m:math xmlns:m="http://www.w3.org/1998/Math/MathML"> <m:mrow> <m:mi>R</m:mi> <m:mo>=</m:mo> <m:mi>K</m:mi> <m:mo>[</m:mo> <m:msub> <m:mi>ξ</m:mi> <m:mn>1</m:mn> </m:msub> <m:mo>,</m:mo> <m:msub> <m:mi>ξ</m:mi> <m:mn>2</m:mn> </m:msub> <m:mo>,</m:mo> <m:mo>...</m:mo> <m:mo>,</m:mo> <m:msub> <m:mi>ξ</m:mi> <m:mi>m</m:mi> </m:msub> <m:mo>]</m:mo> </m:mrow> </m:math> $ R=K[\xi _1,\xi _2,\ldots ,\xi _m] $ over a field K of characteristic 0. The K -algebra <m:math xmlns:m="http://www.w3.org/1998/Math/MathML"> <m:mrow> <m:msup> <m:mi>R</m:mi> <m:mi>Δ</m:mi> </m:msup> <m:mo>=</m:mo> <m:mrow> <m:mo>{</m:mo> <m:mi>h</m:mi> <m:mo>∈</m:mo> <m:mi>R</m:mi> <m:mo>∣</m:mo> <m:mi>Δ</m:mi> <m:mrow> <m:mo>(</m:mo> <m:mi>h</m:mi> <m:mo>)</m:mo> </m:mrow> <m:mo>=</m:mo> <m:mn>0</m:mn> <m:mo>}</m:mo> </m:mrow> </m:mrow> </m:math> ${R^\Delta = \lbrace h \in R \mid \Delta (h) = 0\rbrace }$ is called the algebra of constants. Nowicki considered the case where the Jordan matrix for Δ acting on R 1 , the degree 1 component of R , has only Jordan blocks of size 2. He conjectured that a certain set generates <m:math xmlns:m="http://www.w3.org/1998/Math/MathML"> <m:msup> <m:mi>R</m:mi> <m:mi>Δ</m:mi> </m:msup> </m:math> $R^{\Delta }$ in that case. Recently Khoury, Drensky and Makar-Limanov and Kuroda have given proofs of Nowicki's conjecture. Here we consider the case where the Jordan matrix for Δ acting on R 1 has only Jordan blocks of size at most 3. We use combinatorial methods to give a minimal set of generators 𝒢 for the algebra of constants <m:math xmlns:m="http://www.w3.org/1998/Math/MathML"> <m:msup> <m:mi>R</m:mi> <m:mi>Δ</m:mi> </m:msup> </m:math> $R^{\Delta }$ . Moreover, we show how our proof yields an algorithm to express any <m:math xmlns:m="http://www.w3.org/1998/Math/MathML"> <m:mrow> <m:mi>h</m:mi> <m:mo>∈</m:mo> <m:msup> <m:mi>R</m:mi> <m:mi>Δ</m:mi> </m:msup> </m:mrow> </m:math> $h \in R^\Delta $ as a polynomial in the elements of 𝒢. In particular, our solution shows how the classical techniques of polarization and restitution may be used to augment the techniques of SAGBI bases to construct generating sets for subalgebras.

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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)0.001
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesMeta-epidemiology (narrow)
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 score0.105
Threshold uncertainty score1.000

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.001
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0010.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0010.001
Research integrity0.0010.001
Insufficient payload (model declined to judge)0.0010.000

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 head0.056
GPT teacher head0.320
Teacher spread0.264 · 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