2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/57612We show that the Garnier system in n-variables has affine Weyl group symmetry of type $B^{(1)}_{n+3}$. We also formulate the $τ$ functions for the Garnier system (or the Schlesinger system of rank 2) on the root lattice $Q(C_{n+3})$ and show that they satisfy Toda equations, Hirota-Miwa equations and bilinear differential equations.33 pagesMathematical PhysicsRepresentation Theorytext