2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/55253Jackiw and Rebbi found two types of intrinsically stable or `fundamental' soliton (kinks in 1+1 D and magnetic monopoles in 3+1 D) which can carry pieces of elementary-particle charges. After two decades there are no more, and it is argued here why that is inevitable.10 pages, LATEX with no macros. Added discussion of another fundamental soliton, the magnetic vortex, explaining why it doesn't fractionate chargeHigh Energy Physics - Theorytext