2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/80834We prove that the Schafer-Wayne short pulse equation (SPE) which describes the propagation of ultra-short optical pulses in nonlinear media is integrable. First, we discover a Lax pair of the SPE which turns out to be of the Wadati-Konno-Ichikawa type. Second, we construct a chain of transformations which relates the SPE with the sine-Gordon equation.7 pagesExactly Solvable and Integrable SystemsMathematical PhysicsAnalysis of PDEsOpticstext