2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/202232Treating problems in full general relativity is highly complex and frequently approximate methods are employed to simplify the solution. We present comparative solutions of a infinitesimally thin relativistic, stationary, rigidly rotating disk obtained using the full equations and the approximate approach suggested by Wilson & Mathews. We find that the Wilson-Mathews method has about the same accuracy as the first post-Newtonian approximation.4 Pages, 5 eps-figures, uses revtex.sty. Submitted to PRLGeneral Relativity and Quantum CosmologyAstrophysicstext