2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/39268Several issues related to the question "How simple can Ginsparg-Wilson fermionic actions be?" are discussed, and it is suggested that simplicity in the eigenspace should be looked for.8 pages, 2 figures, Contribution to the workshop "Lattice Fermions and Structure of the Vacuum", Oct 5-9, 1999, Dubna, Russia. Equation on page 7 corrected. Typo related to eq.(2) corrected. Two formulations made more clearHigh Energy Physics - Latticetext