THE ESTIMATE FOR THE DT-MODULE OF SMOOTHNESS

Автор(и)

  • O. Dyuzhenkova

Анотація

We consider the DT - module of smoothness, introduced by Ditzian and Totik. We investigate the connection between the DT - module of smoothness of the r -s derivative of the function f and classical module of smoothness of f the r -s derivative of the periodic function f (cost) . In particular, we get the upper estimate for the DT -module of smoothness.

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