双调和Abel-Poisson算子对Zygmund函数类的逼近

On the Approximation of Functions of the Zygmund Class by Biharmonic Poisson Integrals

建立了双调和Abel-Poisson算子对Zygmund函数类的逼近度的渐近等式.

The paper has established the asymptotic equality of the upper bound of the deviation of the biharmonic Poisson integrals from functions of the Zygmund class.