2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/87636It is proved that in classical electrodynamics the uniform rectilinear motion of charged "rigid" sphere with self-action (Sommerfeld model) is stable.Dedicated to the 90-anniversary of Moscow State University Professor Anatolii A.Vlasov (1908-1975) (in Latex)Classical Physicstext