RT journal article T1 Integration of Differential Equations by C∞-Structures A1 Pan Collantes, Antonio Jesús A1 Muriel Patino, María Concepción A1 Ruiz Serván, Adrián A2 Matemáticas K1 C∞-structure K1 C∞-symmetry of a distribution K1 differential equations K1 integrating factor K1 solvable structure K1 symmetry of a distribution AB Several integrability problems of differential equations are addressed using the concept of a (Formula presented.) -structure, a recent generalization of the notion of solvable structure. Specifically, the integration procedure associated with (Formula presented.) -structures is used to integrate a Lotka–Volterra model and several differential equations that lack sufficient Lie point symmetries and cannot be solved using conventional methods. PB Multidisciplinary Digital Publishing Institute (MDPI) SN 2227-7390 YR 2023 FD 2023 LK http://hdl.handle.net/10498/32088 UL http://hdl.handle.net/10498/32088 LA eng DS Repositorio Institucional de la Universidad de Cádiz RD 10-may-2026