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A test function theorem and apporoximation by pseudopolynomials
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DOI：10.1017/s0004972700004494.png)
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Abstract
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We prove a Korovkin-type theorem on approximation of bivariate functions in the space ofB-continuous functions (introduced by K. Bögel in 1934). As consequences, some sequences of uniformly approximating pseudopolynomials are obtained.
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