Estimations of the integral of modulus for mixed derivatives of the sum of double trigonometric series
Authors
S. B. Hembars'ka
P. V. Zaderei
Киев. нац. ун-т технологий и дизайна
Abstract
For functions of two variables defined by trigonometric series with quasiconvex coefficients, we estimate their variations
in the Hardy – Vitali sense.
