RT journal article T1 Potential systems of a Buckley–Leverett equation: Lie point symmetries and conservation laws A1 Bruzón Gallego, María de los Santos A1 Márquez Lozano, Almudena del Pilar A1 Recio Rodríguez, Elena A1 Garrido Letrán, Tamara María A1 Rosa Silva, Rafael de la A2 Matemáticas K1 Buckley–Leverett equation K1 Symmetries K1 Conservation laws K1 Potential symmetries AB In this work, we study a Buckley–Leverett equation of two-phase flow in porousmedia from the point of view of the Lie theory. We find that for some functions theequation has abundant exact solutions expressible in terms of Jacobi elliptic functionsand consequently has many solutions in the form of periodic waves or solitarywaves. We determine low-order conservation laws by using the multiplier method.From conservations laws, we construct the potential systems. From these systemswe deduce potential equations. We study these equations from the point of viewof Lie theory. Moreover, for these equations some nontrivial conservation laws areconstructed by using the multipliers method. SN 1572-8897 YR 2020 FD 2020 LK http://hdl.handle.net/10498/33317 UL http://hdl.handle.net/10498/33317 LA eng DS Repositorio Institucional de la Universidad de Cádiz RD 10-nov-2026