3 papers
math.OA2026
Lattices of strongly reflexive masa-bimodules
Rupert H. Levene, Ying-Fen Lin, Ivan G. Todorov
We characterise the density of the positive rank one subspace of a masa-bimodule in terms of its support. We prove that strongly reflexive masa-bimodules form a Boolean lattice und…
math.OA2026
Operator systems and positive extensions over discrete groups
Evgenios T. A. Kakariadis, Malte Leimbach, Ivan G. Todorov +1
The extension problem asks whether positive semi-definite functions on a symmetric unital subset of a discrete group can be extended to positive semi-definite functions on the whol…
math.OA2025
Symmetrisations of operator spaces
George K. Eleftherakis, Evgenios T. A. Kakariadis, Ivan G. Todorov
Let be a unital C*-algebra, be an operator -system and be an operator space that is a left operator -module. We introduce the symmetrisation of the pair a…