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Record W4414361330 · doi:10.1016/j.jmaa.2025.130074

C⁎-supports and abnormalities of operator systems

2025· article· en· W4414361330 on OpenAlexafffund
Raphaël Clouâtre, Colin Krisko

Bibliographic record

VenueJournal of Mathematical Analysis and Applications · 2025
Typearticle
Languageen
FieldMathematics
TopicHolomorphic and Operator Theory
Canadian institutionsUniversity of Manitoba
FundersNatural Sciences and Engineering Research Council of Canada
KeywordsInjective functionSubspace topologyOperator (biology)Property (philosophy)Hilbert spaceUniquenessExtension (predicate logic)Envelope (radar)

Abstract

fetched live from OpenAlex

Let S be a concrete operator system represented on some Hilbert space H . A ⁎ C ⁎ -support of S is the ⁎ C ⁎ -algebra generated (via the Choi–Effros product) by S inside an injective operator system acting on H . By leveraging Hamana's theory, we show that such a ⁎ C ⁎ -support is unique precisely when ⁎ C ⁎ ( S ) (the ⁎ C ⁎ -algebra generated in B ( H ) with the usual product) is contained in every copy of the injective envelope of S that acts on H . Further, we demonstrate how the uniqueness of certain ⁎ C ⁎ -supports can be used to give new characterizations of the unique extension property for ⁎-representations, as well as the hyperrigidity of S . In another direction, we utilize the collection of all ⁎ C ⁎ -supports of S to describe the subspace generated by the so-called abnormalities of S , thereby complementing an earlier result of Kakariadis.

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)0.001
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 score0.383
Threshold uncertainty score0.239

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0010.000
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 science0.0000.000
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 head0.014
GPT teacher head0.300
Teacher spread0.285 · 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
Published2025
Admission routes2
Has abstractyes

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