简介:ThispapergivesanadditionaldefinitiontomultivariatetruncatedpowerT(x|x1,…,xn)whentheknotsx1,…,xndonotspanthewholespacetowhichx1,…,xnbelong.Bywhich,togetherwiththerecurrencerelation,thepracticalevaluationofT(x|x1,…,xn)willbeveryconvenientandefficient.Thesamediscussionisalsodonetoboxsplines.