2 papers
math.FA2021
Necessary conditions for existence of -contractions and examples of -contractions
Shubhankar Mandal, Avijit Pal
The fundamental result of B. Sz. Nazy states that every contraction has a coisometric extension and a unitary dilation. The isometric dilation of a contraction on a Hilbert space m…
math.FA2016
Contractivity and complete contractivity for finite dimensional Banach Spaces
Gadadhar Misra, Avijit Pal, Cherian Varughese
Choose an arbitrary but fixed set of matrices and let be the unit ball with respect to the norm $\|\cdot\|_{\mathbf…