2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/55063In this paper we propose a simple method for building exactly solvable multi-parameter spectral equations which in turn can be used for constructing completely integrable and exactly solvable quantum systems. The method is based on the use of a special functional relation which we call the scalar triangle equation because of its similarity to the classical Yang-Baxter equation.13 pages, LaTeXHigh Energy Physics - Theorytext