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Record W1944508940 · doi:10.1090/s0002-9939-06-07916-0

Simple real rank zero algebras with locally Hausdorff spectrum

2006· article· en· W1944508940 on OpenAlexaff
Ping Wong Ng

Bibliographic record

VenueProceedings of the American Mathematical Society · 2006
Typearticle
Languageen
FieldMathematics
TopicAdvanced Operator Algebra Research
Canadian institutionsUniversity of New BrunswickFields Institute for Research in Mathematical Sciences
Fundersnot available
KeywordsMathematicsHausdorff spaceRank (graph theory)Zero (linguistics)Bounded functionSeparable spaceSpectrum (functional analysis)Simple (philosophy)CombinatoricsHausdorff dimensionDimension (graph theory)Locally compact spaceDiscrete mathematicsMathematical analysis

Abstract

fetched live from OpenAlex

Let $\mathcal {A}$ be a unital, simple, separable $C^*$-algebra with real rank zero, stable rank one, and weakly unperforated ordered $K_0$ group. Suppose, also, that $\mathcal {A}$ can be locally approximated by type I algebras with Hausdorff spectrum and bounded irreducible representations (the bound being dependent on the local approximating algebra). Then $\mathcal {A}$ is tracially approximately finite dimensional (i.e., $\mathcal {A}$ has tracial rank zero). Hence, $\mathcal {A}$ is an $AH$-algebra with bounded dimension growth and is determined by $K$-theoretic invariants. The above result also gives the first proof for the locally $AH$ case.

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 machine prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.001
Version: metacan-v3-hybrid-931329e0061cValidation 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 score0.003
Threshold uncertainty score0.010

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0000.001
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0010.000
Science and technology studies0.0010.002
Scholarly communication0.0010.002
Open science0.0000.001
Research integrity0.0000.001
Insufficient payload (model declined to judge)0.0030.000

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 head0.014
GPT teacher head0.289
Teacher spread0.275 · 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 source (direct Gemma or distilled Codex), 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

Citations8
Published2006
Admission routes1
Has abstractyes

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Same venueProceedings of the American Mathematical SocietySame topicAdvanced Operator Algebra ResearchFrench-language works237,207