2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/55109It is shown that, in QED$_{3}$, the Pauli-Villars regularization involving a pair of auxiliary fermion fields with masses of opposite sign leads to results that are consistent with those obtained using all other parity-preserving schemes of regularization. At the same time, ambiguity problems remain unsolved in non-Abelian models (QCD$_{3}$).Latex, 9 pagesHigh Energy Physics - Theorytext