2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/168729We prove that some perturbation of a J-selfadjoint second order differential operator admits factorization and use this new representation of the operator to prove compactness of its resolvent and to find its domain.Spectral Theory47B10; 34L40On Factorization of a Perturbation of a J-selfadjoint Operator Arising in Fluid Dynamicstext