Springer Online Journal Archives 1860-2000
Abstract We establish a result related to a theorem of de Boor and Jia . Their theorem, in turn, corrected and extended a result of Fix and Strang  concerning controlled approximation. In our result, the approximating functions are not required to have compact support, but satisfy instead conditions on their behavior at ∞. Our theorem includes some recent results of Jackson  and is closely related to the work of Buhmann .
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