MétaCan
Menu
Back to cohort
Record W1893802408

A note on LU decomposition of the Discrete Fourier Transform matrix

2015· preprint· en· W1893802408 on OpenAlexaff
Alexey Kuznetsov

Bibliographic record

VenuearXiv (Cornell University) · 2015
Typepreprint
Languageen
FieldComputer Science
TopicMatrix Theory and Algorithms
Canadian institutionsYork University
Fundersnot available
KeywordsMathematicsToeplitz matrixVandermonde matrixMatrix (chemical analysis)InverseMatrix decompositionTriangular matrixTransposeCombinatoricsDecompositionDiscrete Fourier transform (general)DFT matrixLU decompositionPure mathematicsFourier transformSymmetric matrixMathematical analysisSquare matrixPhysicsFourier analysisEigenvalues and eigenvectorsFractional Fourier transformGeometryInvertible matrixQuantum mechanics
DOInot available

Abstract

fetched live from OpenAlex

We describe some properties of the lower triangular Toeplitz matrix Tq with coefficients ti,j = 1/(q; q)i−j, where (z; q)k is the q-Pochhammer symbol. We identify explicitly the inverse of Tq and show that both this matrix and its transpose appear in LU decomposition of the Vandermonde matrix Vq having coefficients vi,j = q ij. When q is the n-th root of unity, our result gives an explicit LU decomposition of the Discrete Fourier Transform matrix.

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.

How this classification was reachedexpand

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: none
GenreCandidate signal: Empirical · Consensus signal: none
Teacher disagreement score0.883
Threshold uncertainty score0.814

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 science0.0020.001
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 head0.035
GPT teacher head0.219
Teacher spread0.183 · 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

Classification

machine, unvalidated

Machine predicted; a candidate call from one teacher head, not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designTheoretical or conceptual
Domainnot available
GenreEmpirical

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

Quick stats

Citations0
Published2015
Admission routes1
Has abstractyes

Explore more

Same venuearXiv (Cornell University)Same topicMatrix Theory and AlgorithmsFrench-language works237,207