2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/75938By using cutting strips and transformations on outside decompositions of a skew diagram, we show that the Giambelli type matrices of a skew Schur function are stably equivalent to each other over symmetric functions. As a consequence, the Jacobi-Trudi matrix and the dual Jacobi-Trudi matrix are stably equivalent over symmetric functions. This gives an affirmative answer to an open problem posed by Kuperberg.16 pages, 4 figuresCombinatorics05E05, 05A15text