2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/116205We report several new transformation theorems that map perfect fluid spheres into perfect fluid spheres. In addition, we report new ``solution generating'' theorems for the TOV, whereby any given solution can be ``deformed'' to a new solution.3 pages, 0 figures, to appear in the proceedings of the Eleventh Marcel Grossmann Meeting on General Relativity (MG11), 23 - 29 July, 2006, Berlin, GermanyGeneral Relativity and Quantum Cosmologytext