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Record W1968227544 · doi:10.4153/cmb-2009-024-5

Dunford–Pettis Properties and Spaces of Operators

2009· article· en· W1968227544 on OpenAlexvenueno aff
Ioana Ghenciu, Paul Lewis

Bibliographic record

VenueCanadian Mathematical Bulletin · 2009
Typearticle
Languageen
FieldMathematics
TopicAdvanced Banach Space Theory
Canadian institutionsnot available
Fundersnot available
KeywordsMathematicsBanach spaceSubspace topologySpace (punctuation)Discrete mathematicsBasis (linear algebra)Pure mathematicsCompact operatorMathematical analysisExtension (predicate logic)Geometry

Abstract

fetched live from OpenAlex

Abstract J. Elton used an application of Ramsey theory to show that if X is an infinite dimensional Banach space, then c 0 embeds in X , ℓ 1 embeds in X , or there is a subspace of X that fails to have the Dunford–Pettis property. Bessaga and Pelczynski showed that if c 0 embeds in X *, then ℓ ∞ embeds in X *. Emmanuele and John showed that if c 0 embeds in K ( X , Y ), then K ( X , Y ) is not complemented in L ( X , Y ). Classical results from Schauder basis theory are used in a study of Dunford–Pettis sets and strong Dunford–Pettis sets to extend each of the preceding theorems. The space L w* ( X *, Y ) of w* – w continuous operators is also studied.

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)0.001
metaresearch head score (Gemma)0.003
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 score0.005
Threshold uncertainty score0.017

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0010.003
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.001
Bibliometrics0.0020.001
Science and technology studies0.0020.003
Scholarly communication0.0030.004
Open science0.0010.002
Research integrity0.0010.002
Insufficient payload (model declined to judge)0.0050.000

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 head0.027
GPT teacher head0.250
Teacher spread0.223 · 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

Citations5
Published2009
Admission routes1
Has abstractyes

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Same venueCanadian Mathematical BulletinSame topicAdvanced Banach Space TheoryFrench-language works237,207