2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/106395Finite dimensional linear spaces (both complex and real) with indefinite scalar product [.,.] are considered. Upper and lower bounds are given for the size of an indecomposable matrix that is normal with respect to this scalar product in terms of specific functions of v = min{v-, v+}, where v-, (v+) is the number of negative (positive) squares of the form [x,x]. All the bounds except for one are proved to be strict.9 pagesFunctional AnalysisRings and Algebras47B50, 46C20, 47B15, 47B40text