2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/152774The authors discuss the role of controversy in mathematics as a preface to two opposing articles on computational complexity theory: "Some basic information on information-based complexity theory" by Beresford Parlett [math.NA/9201266] and "Perspectives on information-based complexity" by J. F. Traub and Henryk Woźniakowski [math.NA/9201269].2 pages. Abstract added in migration.History and Overviewtext