OICC Press International Journal of Mathematical Modelling & Computations 2228-6233 2 3 2016 06 21 APPROXIMATION OF 3D-PARAMETRIC FUNCTIONS BY BICUBIC B-SPLINE FUNCTIONS 211 220 EN M. Amirfakhrian Islamic Azad University, Central Tehran Branch Journal Article 2016 06 21 In this paper we propose a method to approximate a parametric 3 D-function by bicubic B-spline functions