2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/76735This work considers the algebras of functions in the quantum matrix ball. An explicit formula for a positive invariant integral is presented.LaTeX, 5 pages, Some formulae are correctedQuantum AlgebraComplex VariablesOperator Algebras81R50 (Primary) 81Q99, 32M15 (Secondary)text