arXiv subjects

Kentaro Itoh

Publications and source records attributed to Kentaro Itoh.

2 recordsLinked to original sources

arXiv2015

Inequalities for derivative of polynomial approximation with Erdos type weight

H. N. Mhaskar obtained the inequalities for derivative of polynomial approximation with Freud type weight. In this paper, we showed the counterpart of the inequalities with Erdos type weight.

math.CA↗

arXiv2014

An estimate for derivative of the de la Vallee Poussin mean

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 plays an important role.

math.CA↗