Symmetry Preserving Numerical Schemes for Partial Differential Equations   and their Numerical Tests
  The method of equivariant moving frames on multi-space is used to construct symmetry preserving finite difference schemes of partial differential equations invariant under finite-dimensional symmetry groups. Invariant numerical schemes for a heat equation with a logarithmic source and the spherical Burgers equation are obtained. Numerical tests show how invariant schemes can be more accurate than standard discretizations on uniform rectangular meshes. 
Rapha\"el Rebelo and Francis Valiquette
math-ph math.MP math.NA