2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/77318Elementary proofs are given for sums of Schur functions over partitions into at most n parts each less than or equal to m for which i) all parts are even, ii) all parts of the conjugate partition are even. Also, an elementary proof of a recent result of Ishikawa and Wakayama is given.Combinatorics05A17, 11P81Elementary proofs of identities for Schur functions and plane partitionstext