Ryozi Sakai

collaborators

3 papers

math.CA2014

Pointwise Convergence of Fourier-type Series with Exponential Weights

Hee Sun Jung, Ryozi Sakai

Let $R = (- \infty, \infty)$ , and let $Q \in C^{1} (R) : R \to [0, \infty)$ be an even function. We consider the exponential weights $w (x) = e^{- Q (x)}$ , $x\in…

math.CA2014

$L_{p}$ -Convergence of higher order Hermite or Hermite-Fejér interpolation polynomials with exponential-type weights

Hee Sun Jung, Ryozi Sakai

Let $R = (- \infty, \infty)$ , and let $Q \in C^{1} (R) : R \to R^{+} = [0, \infty)$ be an even function, which is an exponent. We consider the weight $…

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…

Pointwise Convergence of Fourier-type Series with Exponential Weights

Lp​-Convergence of higher order Hermite or Hermite-Fejér interpolation polynomials with exponential-type weights

An estimate for derivative of the de la Vallee Poussin mean

$L_{p}$ -Convergence of higher order Hermite or Hermite-Fejér interpolation polynomials with exponential-type weights