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math.OA2026
Morita equivalence for quantum graphs
Alexandros Chatzinikolaou, Gage Hoefer, Nikolaos Koutsonikos-Kouloumpis +1
We introduce an operator-algebraic framework for Morita equivalence of quantum graphs based on -equivalence of operator systems introduced by Eleftherakis, Kakariadis and Todoro…
math.OA2025
Morita equivalence and stable isomorphism via unitary operators
Nikolaos Koutsonikos-Kouloumpis
We define -equivalence for dual operator systems and prove that it is an equivalence relation. We show that weak TRO-equivalence of dual operator spaces induces a stable isomorp…
math.OA2024
Unital operator spaces and discrete groups
Nikolaos Koutsonikos-Kouloumpis
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…