On the M�bius invariant principal functions of Pincus

Source
arXiv
Date Issued
2023-04-01
Author(s)
Ghosh, Sagar
Misra, Gadadhar
Abstract
In this semi-expository short note, we prove that the only homogeneous \textit{pure} hyponormal operator T with rank(T?T?TT?)=1, modulo unitary equivalence, is the unilateral shift.
URI
Subjects
M�bius invariant
Pincus
Hilbert space
Orthonormal basis
Putnam's inequality