Abstract
The linear positive operators are conceptually simpler, and easier to construct and study, but they lack rapidity of convergence for sufficiently smooth functions.
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Gupta, V., Agarwal, R.P. (2014). Linear and Iterative Combinations. In: Convergence Estimates in Approximation Theory. Springer, Cham. https://doi.org/10.1007/978-3-319-02765-4_4
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DOI: https://doi.org/10.1007/978-3-319-02765-4_4
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