Kang, J.; Liu, X.; Olver, P.J.; Qu, C.
(Symmetry, Integrability and Geometry: Methods and Applications, 2017)
In this paper, we study explicit correspondences between the integrable Novikov and Sawada-Kotera hierarchies, and between the Degasperis-Procesi and Kaup-Kupershmidt hierarchies. We show how a pair of Liouville transformations ...