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Rate of Convergence in Sobolev Space

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Abstract (2. Language): 
In this paper, a new theorem on degree of approximation in L2 p( ) Sobolev space of integrable functions of two variables by Bernstein-Chlodowsky polnomials on an unbounded triangular domain is studied. Also by using the K- functional of Peetre the order of approximation are established.
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