17 citations · 91 across the 25 of their papers we have counts for
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math.OA2015★ 3 cited
Positive extensions of Schur multipliers
Rupert H. Levene, Ying-Fen Lin, Ivan G. Todorov
We introduce partially defined Schur multipliers and obtain necessary and sufficient conditions for the existence of extensions to fully defined positive Schur multipliers, in term…
math.OA2015★ 2 cited
Schur idempotents and hyperreflexivity
G. K. Eleftherakis, R. H. Levene, I. G. Todorov
We show that the set of Schur idempotents with hyperreflexive range is a Boolean lattice which contains all contractions. We establish a preservation result for sums which implies…