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Showing 2014 · math.CAShow all
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math.CA2014
An estimate for derivative of the de la Vallee Poussin mean
Kentaro Itoh, Ryozi Sakai, Noriaki Suzuki
In this paper, we discuss derivative of the de la Vallee Poussin mean for exponential weights on real line. When we lead an inequality, an estimate for the Christoffel function pla…
math.CA2014
Higher order derivatives of approximation polynomials on
Hee Sun Jung, Ryozi Sakai
D. Leviatan has investigated the behavior of the higher order derivatives of approximation polynomials of the differentiable function on . Especially, when is the…