Invariant tori of a class of discontinuous systems Liu, Qihuai Torres Villarroya, Pedro José Invariant curve Piecewise continuous system Boundedness By using suitable canonical transformation and Moser's small twist Theorem, we prove the existence of invariant tori of large amplitude for a periodically forced second-order differential equation with a jump discontinuity. 2025-10-20T07:46:48Z 2025-10-20T07:46:48Z 2026-02 journal article Liu, Q., & Torres, P. J. (2026). Invariant tori of a class of discontinuous systems. Journal of Differential Equations, 453(113818), 113818. https://doi.org/10.1016/j.jde.2025.113818 https://hdl.handle.net/10481/107152 10.1016/j.jde.2025.113818 eng http://creativecommons.org/licenses/by/4.0/ open access Atribución 4.0 Internacional Elsevier