2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/185478Through an $\hbar$-expansion of the confined Calogero model with spin exchange interactions, we extract a generating function for the involutive conserved charges of the Frahm-Polychronakos spin chain. The resulting conservation laws possess the spin chain yangian symmetry, although they are not expressible in terms of these yangians.26 p. (harvmac b mode); minor corrections and a new appendix; to appear in J. Phys. AHigh Energy Physics - Theorytext