2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/56550Fusion coefficients for affine Lie algebras are fixed by the corresponding tensor-product coefficients and a set of threshold levels. It is shown how the information concerning the threshold level is coded in the fusion basis, which is a set of inequalities that completely describes the fusion coefficients. The construction of the su(2) fusion basis is presented in detail.Latex and Fizik, 12 p. Talk presented by PM at the 6-th Wigner symposium, Istambul, Aug 1999Mathematical PhysicsHigh Energy Physics - Theorytext