2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/114978We present an approach for construction of functional bases of differential invariants for some infinite-dimensional algebras with coefficients of generating operators depending on arbitrary functions. An example for the infinite-dimensional Poincare-type algebra is given.Talk at the conference "Symmetry and Perturbation Theory 2004", Cala Gonone, Sardinia, Italy, May 30 - June 6, 2004Mathematical Physics35A30; 22E65text