Speciality: 01.01.01 (Real analysis, complex analysis, and functional analysis)
Birth date: 18.10.1965
Phone: +380997639457
E-mail:
Keywords: Poisson integral, Kolmogorov-Nikol'skii problem,asymptotic equation, asymptotic decomposition, Weil-Nagy classes, classes of Stepanets
UDC: 517.5

Subject:

Approximation theory

Main publications:

1. Yu. I. Kharkevich, T. A. Stepanyuk, “Approksimativnye svoistva integralov Puassona na klassakh $C^{\psi}_{\beta}H^{\alpha}$”, Matematicheskie zametki, 96:6 (2014), 939–952      
2. T. V. Zhyhallo, Yu. I. Kharkevych, “Approximation of $(\psi,\beta)$-differentiable functions by Poisson integrals in the uniform metric”, Ukrainian Mathematical Journal, 61:11 (2009), 1497–1515    
3. K. M. Zhyhallo, Yu. I. Kharkevych, “Approximation of conjugate differentiable functions by their Abel-Poisson integrals”, Ukrainian Mathematical Journal, 61:1 (2009), 86–98    
4. K. M. Zhyhallo, Yu. I. Kharkevych, “Complete asymptotics of the deviation of a class of differentiable functions from the set of their harmonic Poisson integrals”, Ukrainian Mathematical Journal, 54:1 (2002), 51–63    
5. K. M. Zhyhallo,Yu. I. Kharkevych, “Approximation of differentiable periodic functions by their biharmonic Poisson integrals”, Ukrainian Mathematical Journal, 54:9 (2002), 1462–1470    

Publications in Math-Net.Ru

Personal pages:

• 

Organisations:

• Lesya Ukrainka East European National University