2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/99167We describe the Lie bialgebra structure on the Lie superalgebra sl(2,1) related to an r-matrix that cannot be obtained by a Belavin-Drinfeld type construction. This structure makes sl(2,1) into the Drinfeld double of a four-dimensional subalgebra.Rings and AlgebrasQuantum Algebratext