2024/09/20 by Nikolaos Koutsonikos-Kouloumpis, Koutsonikos-Kouloumpis, Nikolaos
Mathematics · #FOS: Mathematics #Mathematical Analysis and Transform Methods #Operator Algebras (math.OA) #Spectral Theory in Mathematical Physics #advanced mathematical theories
paper · pdf · doi:10.48550/arxiv.2409.13549
openalex publication_date 2024/09/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We introduce the trivial intersection property for concrete operator spaces and we show that a unital space with this property has no nontrivial boundary ideals. We provide various examples of such spaces, among which are strongly reflexive masa bimodules and completely distributive CSL algebras. We show that unital operator spaces acting on ℓ2(Γ) for any set Γ, that contain the masa ℓ^∞(Γ), possess the trivial intersection property, and we use this to prove that a unital surjective complete isometry between such spaces is a unitary equivalence. Then, we apply these results to w^*-closed ℓ^∞(G)-bimodules acting on ℓ2(G) for a group G and we relate them to algebraic properties of G.