2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/221611We correspond to any factor algebra of the unitriangular Lie algebra with respect to a regular ideal some permutation. In terms of this permutation one can construct a diagram, that allows to calculate index and maximal dimension of coadjoint representation.13 pagesRepresentation TheorySymplectic Geometry17B30text