2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/57319A simple technique for expanding the free energy of general six-vertex models about free-fermion points is introduced. This technique is used to verify a Coulomb gas prediction about the behavior of the leading singularity in the free energy of the staggered F-model at zero staggered field.8 pagesMathematical PhysicsStatistical Mechanicstext