摘要
主要研究二元函数用Ｌａｇｒａｎｇｅ三角插值多项式的逼近问题，构造一种组合型的三角多项式算子，给出逼近阶的估计．
This paper studies the approximation of two dimensional function by lagrange trigonometric interpolation polynomial.the combination trigonometric interpolation operator is constructed and the evaluate of approximation order is given.
出处
《沈阳建筑工程学院学报》
1998年第3期298-303,共6页
Journal of Shenyang Archit Civil Eng Univ: Nat Sci
关键词
二元三角插值
逼近
节点组
收敛阶
two-dimensional trigonometric interpolation
approximation
nodal points
convergence order
