2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/123616Integrability of the differential constraints arising from the singularity analysis of two (1+1)-dimensional second-order evolution equations is studied. Two nonlinear ordinary differential equations are obtained in this way, which are integrable by quadratures in spite of very complicated branching of their solutions.arxiv version is already offcialExactly Solvable and Integrable SystemsMathematical PhysicsAnalysis of PDEsClassical Analysis and ODEstext