简介:利用中国剩余定理、行列式以及线性方程组理论给出了Lagrange插值公式的几种构造性证明,得到了Vandermonde矩阵的逆矩阵的一种算法.
简介:Iafluencefunctionofastatisticdescribestheeffectofasmallperturbationofthedataonthisstatistic.ThispaperstudiestheinfluencefunctionofsquaredcorrelationcoefficientR^2ofksetsofvariablesdefinedbyY.ZhangandX.ZhuandgivesthevarianceanditsestimationofthesquaredsamplecorrelationcoefficientRn^2.Finally,theresultsobtainedareappliedtoassessingtheinfiuenceofindividualobservationwiththeaidofanexample.