3 papers
math.NA2018
Design of accurate formulas for approximating functions in weighted Hardy spaces by discrete energy minimization
Ken'ichiro Tanaka, Masaaki Sugihara
We propose a simple and effective method for designing approximation formulas for weighted analytic functions. We consider spaces of such functions according to weight functions ex…
cond-mat.mtrl-sci2017
Efficient methods for computing integrals in electronic structure calculations
Hisashi Kohashi, Kosuke Sugita, Masaaki Sugihara +1
Efficient methods are proposed, for computing integrals appeaing in electronic structure calculations. The methods consist of two parts: the first part is to represent the integral…
math.NA2016
An optimal approximation formula for functions with singularities
Ken'ichiro Tanaka, Tomoaki Okayama, Masaaki Sugihara
We propose an optimal approximation formula for analytic functions that are defined on a complex region containing the real interval and possibly have algebraic singularit…