Zhenghua Zhou

activity

20172019

collaborators

3 papers

math.FA2019

Finite Section Method for singular integrals with operator-valued PQC-coefficients and a flip

Torsten Ehrhardt, Zheng Zhou

We establish necessary and sufficient conditions for the stability of the finite section method for operators belonging to a certain $C^{*}$ -algebra of operators acting on the Hilber…

math.FA2018

Asymptotics of determinants for finite sections of operators with almost periodic diagonals

Torsten Ehrhardt, Zheng Zhou

Let $A = (a_{j, k})_{j, k = - \infty}^{\infty}$ be a bounded linear operator on $l^{2} (Z)$ whose diagonals $D_{n} (A) = (a_{j, j - n})_{j = - \infty}^{\infty} \in l^{\infty} (Z)$ are alm…

math.FA2017

On the maximal ideal space of even quasicontinuous functions on the unit circle

Torsten Ehrhardt, Zheng Zhou

Let $P QC$ stand for the set of all piecewise quasicontionus function on the unit circle, i.e., the smallest closed subalgebra of $L^{\infty} (T)$ which contains the classes o…