2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/152724We prove a determinantal formula for quantities related to the problem of enumeration of (semi-) meanders, namely the topologically inequivalent planar configurations of non-self-intersecting loops crossing a given (half-) line through a given number of points. This is done by the explicit Gram-Schmidt orthogonalization of certain bases of subspaces of the Temperley-Lieb algebra.TeX using harvmac.tex and epsf.tex, 64 pages (l-mode), 79 figuresHigh Energy Physics - TheoryQuantum Algebratext