9 citations · 10 across the 2 of their papers we have counts for
3 papers
math.FA2026★ 9 cited
Operator-valued rational functions
Raul E. Curto, In Sung Hwang, Woo Young Lee
In this paper we show that every inner divisor of the operator-valued coordinate function, , is a Blaschke-Potapov factor. We also introduce a notion of operator-valued "rati…
math.FA2026★ 1 cited
Subnormal block Toeplitz operators
Mankunikuzhiyil Abhinand, Raul E. Curto, In Sung Hwang +2
In this paper we consider the subnormality of block Toeplitz operators , where is an matrix-valued function on the unit circle of the form $$ Φ=…
math.FA2024
Almost invariant subspaces of shift operators and products of Toeplitz and Hankel operators
Caixing Gu, In Sung Hwang, Hyoung Joon Kim +2
In this paper we formulate the almost invariant subspaces theorems of backward shift operators in terms of the ranges or kernels of product of Toeplitz and Hankel operators. This a…