1 citations · 1 across the 4 of their papers we have counts for
4 papers
On the invariant subspace problem via universal Toeplitz operators on the Hardy space
João Marcos R. do Carmo, Marcos S. Ferreira
The Invariant Subspace Problem (ISP) for Hilbert spaces asks if every bounded linear operator has a non-trivial closed invariant subspace. Due to the existence of universal operato…
A characterization for complex symmetric Toeplitz operators
Marcos S. Ferreira
In this paper we use orthonormal basis for the Hardy space , formed by rational functions, to characterize complex symmetric Toeplitz operators on $H^{2}(\mathbb…
Conjugations on the Hardy space
Marcos S. Ferreira, Geraldo de A. Júnior
A conjugation on a separable complex Hilbert space is an antilinear operator that is isometric and involutive. In this notes, we characterize all conjugations on t…
Some Notes on Complex Symmetric Operators
Marcos S. Ferreira
In this paper we show that every conjugation on the Hardy-Hilbert space is of type , where is an unitary operator and $C_{1}f\left(z\right)=\overline…