2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/38461I describe a Lanczos method to compute the Neuberger Operator and a multigrid algorithm for its inversion.12 pages, 2 figures. Talk given at the ``Interdisciplinary Workshop on Numerical Challenges to Lattice QCD'', Wuppertal, 22-24 August 1999High Energy Physics - Latticetext