2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/163323Karush's proof of McMillan's theorem is recast as an argument involving polynomials with non-commuting indeterminates certain evaluations of which yield the Kraft sums of codes, proving a strengthened version of McMillan's theorem.CombinatoricsInformation Theory05E99, 94A45, 20M05text