2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/94441The Grammian determinant type solutions of the KP hierarchy, obtained through the vectorial binary Darboux transformation, are reduced, imposing suitable differential constraint on the transformation data, to Pfaffian solutions of the BKP hierarchy.8 pages, LaTeX2e with AMSLaTeX and Babel packagesExactly Solvable and Integrable Systemstext