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发布时间：2019-03-09

论文类型：期刊论文

发表时间：2011-11-01

发表刊物：APPLIED MATHEMATICS AND COMPUTATION

收录刊物：EI、SCIE、Scopus

卷号：218

期号：5

页面范围：2036-2043

ISSN号：0096-3003

关键字：Numerical integration formulas of degree three; Cubature formulas; Orthogonal polynomial; Numerical integrations

摘要：Numerical integration formulas in n-dimensional Euclidean space of degree three are discussed. In this paper, for the product regions a method is presented to construct numerical integration formulas of degree three with 2n real points and positive weights. The presented problem is a little different from those dealt with by other authors. All the corresponding one-dimensional integrals can be different from each other and they are also nonsymmetrical. In this paper an n-dimensional numerical integration problem is turned into n one-dimensional moment problems, which simplifies the construction process. Some explicit numerical formulas are given. Furthermore, a more generalized numerical integration problem is considered, which will shed light on the final solution to the third degree numerical integration problem. Crown Copyright (C) 2011 Published by Elsevier Inc. All rights reserved.