2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/145321Kosmann-Lie derivatives in the bundle of Weyl spinors are considered. It is shown that the basic spin-tensorial fields of this bundle are constants with respect to these derivatives.AmSTeX, 22 pages, amsppt styleDifferential GeometryMathematical Physics53B30, 81T20, 22E70text