Abstract. The author extends some results of Z. Ditzian and S. Tikhonov in [3] to the case of functions defined on bounded and unbounded domains with inner singularities.
AMS Subject Classification
(1991): 41A17; 41A10; 18E20
Keyword(s):
embedding theorems,
polynomial inequalities,
moduli of smoothness,
best approximation
Received September 2, 2008, and in revised form November 18, 2008. (Registered under 6428/2009.)
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