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math.FA2026
The Cauchy dual subnormality problem in two variables
Soumyadip Dey
The Cauchy dual subnormality problem asks whether the Cauchy dual of a -isometry is subnormal. This problem has attracted considerable attention due to its connections with mome…
math.FA2026
von Neumann Inequality for a class of Doubly Contractive Weighted Shifts
Soumyadip Dey, Rajeev Gupta, Surjit Kumar
In this article, we investigate the ball version of von Neumann inequality for the class of doubly contractive -tuple of weighted shift. We show that if the weighted shift is ba…