2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/80813Computer algebra procedures to manipulate pseudo-differential operators are implemented to perform calculations with integrable models. We use lazy evaluation and streams to represent and operate with pseudo-differential operators. No order of truncation is needed since terms are produced on demand. We give a series of concrete examples using the computer algebra language MAPLE.Latex file, 36 pages. A resumed version and the program source code will appear in Computer Physics Communications as "PSEUDO: applications of streams and lazy evaluation to integrable models"Exactly Solvable and Integrable SystemsHigh Energy Physics - Theorytext