2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/172890We show that the classical algebra of quaternions is a commutative $\Z_2\times\Z_2\times\Z_2$-graded algebra. A similar interpretation of the algebra of octonions is impossible.3 pagesCommutative AlgebraRings and Algebrastext