The sensitivity and accuracy of fourth o
โ
J.E. Castillo; J.M. Hyman; M.J. Shashkov; S. Steinberg
๐
Article
๐
1995
๐
Elsevier Science
๐
English
โ 878 KB
We construct local fourth-order finite difference approximations of first and second derivatives, on nonuniform grids, in one dimension. The approximations are required to satisfy symmetry relationships that come from the analogous higher-dimensional fundamental operators: the divergence, the gradie