3 papers
math.OA2018
Compressions of compact tuples
Benjamin Passer, Orr Moshe Shalit
We study the matrix range of a tuple of compact operators on a Hilbert space and examine the notions of minimal, nonsingular, and fully compressed tuples. In this pursuit, we refin…
math.OA2018
Invariants in Noncommutative Dynamics
Alexandru Chirvasitu, Benjamin Passer
When a compact quantum group coacts freely on unital -algebras and , the existence of equivariant maps may often be ruled out due to the incompatibility o…
math.OA2018
Shape, Scale, and Minimality of Matrix Ranges
Benjamin Passer
We study containment and uniqueness problems concerning matrix convex sets. First, to what extent is a matrix convex set determined by its first level? Our results in this directio…