4 papers · 1 filter
Russo-Dye type Theorem, Stinespring representation,and Radon Nikodym dervative for invariant block multilinear completely positive maps
Anindya Ghatak, Aryaman Sensarma
In this article, we investigate certain basic properties of invariant multilinear CP maps. For instance, we prove Russo-Dye type theorem for invariant multilinear positive maps on…
A Bishop-Phelps-Bollobás theorem for bounded analytic functions
Neeru Bala, Kousik Dhara, Jaydeb Sarkar +1
Let denote the Banach algebra of all bounded analytic functions on the open unit disc and denote by the Banach space of all bounded linear operat…
A note on commutative and noncommutative Gurariy spaces
Pradipta Bandyopadhyay, Aryaman Sensarma
In this short note, we answer two questions about Gurariy spaces asked in the literature in the affirmative. We also prove the analogue of one of the results for the noncommutative…
Idempotent, model, and Toeplitz operators attaining their norms
Neeru Bala, Kousik Dhara, Jaydeb Sarkar +1
We study idempotent, model, and Toeplitz operators that attain the norm. Notably, we prove that if is a backward shift invariant subspace of the Hardy space $H^2(\mat…