) 中图学技术大荸学系 University of Science and Technology of China DEPARTMENT OF MATHEMATICS 设g(x)=a090(x)+…+an9n(x)则 g(x)=f(x1)=a00(x1)+…+an9n(x1) (ao…,an)有解<→系数行列式不为0 特点: 1.与基函数无关 2.与原函数f(×)无关 3.基函数个数与点个数相同数 学 系 University of Science and Technology of China DEPARTMENT OF MATHEMATICS ( )  = = + + = + + , , ( ) ( ) ( ) ( ) ( ) ( ) ( ) 0 0 0 0 0 n i i i n n i n n a a g x f x a x a x g x a x a x        有解 系数行列式不为0 设 则 1. 与基函数无关 2. 与原函数f(x)无关 3. 基函数个数与点个数相同 特点：