2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/58966Garrett, Ismail, and Stanton gave a general formula that contains the Rogers-Ramanjuan identities as special cases. We show how easy this is when using a determinant that Schur introduced in 1917.Combinatorics05A30Schur's old determinant proves a brand-new theorem of Garrett-Ismail-Stantontext