Houstis, E.N.; Lynch, R.E.; Papatheodorou, T.S. - In: Mathematics and Computers in Simulation (MATCOM) 22 (1980) 2, pp. 91-97
An O(h6) accurate difference approximation to solutions of the Helmholtz equation is derived. The discrete equations are solved using a reduction procedure and Fourier analysis. Its computational performance is compared with a fourth order similar method over a set of linear and mildly nonlinear...