On ℓ‐open and ℓ‐closed C∗‐algebras

Abstract In this paper, we characterize ‐open and ‐closed ‐algebras and deduce that ‐open ‐algebras are ‐closed, as conjectured by Blackadar. Moreover, we show that a commutative unital ‐algebra is ‐open if and only if it is semiprojective.

Authors

Dolapo Muhammed Oyetunbi
Aaron Tikuisis (ORCID: https://orcid.org/0000-0001-7326-382X)

Institutions

University of Ottawa (CA)

Publication Details

Journal: Bulletin of the London Mathematical Society
Published: 2026-02-25
DOI: https://doi.org/10.1112/blms.70306
Primary Topic: Advanced Operator Algebra Research
Type: article
Field-Weighted Citation Impact: 0.00

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article

On ℓ‐open and ℓ‐closed C∗‐algebras

Dolapo Muhammed Oyetunbi, Aaron Tikuisis

Feb 25, 2026

Bulletin of the London Mathematical Society

Advanced Operator Algebra Research

article

On ℓ‐open and ℓ‐closed C∗‐algebras

Dolapo Muhammed Oyetunbi, Aaron Tikuisis

February 25, 2026article en

Abstract

Bulletin of the London Mathematical SocietyVol. 58(3)

University of Ottawa (CA)

Openalex Percentile: Top 26%

Advanced Operator Algebra Research

DOI Source OpenAlex

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On ℓ‐open and ℓ‐closed C∗‐algebras — Dolapo Muhammed Oyetunbi, Aaron Tikuisis · Bulletin of the London Mathematical Society (2026) | TGRS Research Map | TGRS