5 citations · 5 across the 2 of their papers we have counts for
2 papers
math.FA2007
The Horn conjecture for compact selfadjoint operators
H. Bercovici, W. S. Li, D. Timotin
We determine the possible eigenvalues of compact selfadjoint operators A,B,C... with the property that A=B+C+... When all these operators are positive, the eigenvalues were known t…
math.OA2005★ 5 cited
Characteristic functions for multicontractions and automorphisms of the unit ball
Chafiq Benhida, Dan Timotin
A \emph{multicontraction} on a Hilbert space $\HH$ is an -tuple of operators acting on $\HH$, such that $\sum_{i=1}^n T_i T_i^*\le \1_\HH$. We obtain some resu…