2 citations · 3 across the 3 of their papers we have counts for
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Maximal Tracial Algebras
Don Hadwin, Hassan Yousefi
We introduce and study the notion of maximal tracial algebras. We prove several results in a general setting based on dual pairs and multiplier pairs. In a special case that X is a…
Null-orbit reflexive operators
Don Hadwin, Ileana Ionascu, Hassan Yousefi
We introduce and study the notion of null-orbit reflexivity, which is a slight perturbation of the notion of orbit-reflexivity. Positive results for orbit reflexivity and the recen…
C-orbit reflexive operators
Don Hadwin, Ileana Ionascu, Michael McHugh +1
We introduce the notion of C-orbit reflexivity and study its properties. An operator on a finite-dimensional space is C-orbit reflexive if and only if the two largest blocks in its…
Stable and Norm-stable Invariant Subspaces
Alexander Borichev, Don Hadwin, Hassan Yousefi
We prove that if T is an operator on an infinite-dimensional Hilbert space whose spectrum and essential spectrum are both connected and whose Fredholm index is only 0 or 1, then th…