Alberto A. Condori

collaborators

2 papers

math.FA2011

An index formula in connection with meromorphic approximation

Alberto A. Condori

Let $Φ$ be a continuous $n \times n$ matrix-valued function on the unit circle $\T$ such that the $(k - 1)$ th singular value of the Hankel operator with symbol $Φ$ is greater than the…

math.FA2008

On the sum of superoptimal singular values

Alberto A. Condori

We discuss the following extremal problem and its relevance to the sum of the so-called superoptimal singular values of a matrix function: Given an $m \times n$ matrix function $Φ$ …