Finite differences.

Propagating beam analysis of optical waveguides by: Yamauchi, Junji (Language materials, printed)

Finite difference methods in financial equation approach by: Duffy, Daniel J. (Language materials, printed)

Higher order FDTD schemes for waveguide and antenna structures by: Tsiboukis, Theodoros D.; Kantartzis, Nikolaos V. (Language materials, printed)

Perfectly Matchel Layer (PML) for computational electromagnetics by: Berenger, Jean-Pierre (Language materials, printed)