A new definition of rough paths on manifolds

Abstract

Smooth manifolds are not the suitable context for trying to generalize the concept of rough paths as quantitative estimates -which will be lost is this case- are key in this matter. Moreover, even with a definition of rough paths in smooth manifolds, rough differential equations can only be expected to be solved locally in such a case. In this paper, we first recall the foundations of the Lipschitz geometry, introduced in "Rough Paths on Manifolds" (Cass, T., Litterer, C. & Lyons, T.), along with the main findings that encompass the classical theory of rough paths in Banach spaces. Then we give what we believe to be a minimal framework for defining rough paths on a manifold that is both less rigid than the classical one and emphasized on the local behaviour of rough paths. We end by explaining how this same idea can be used to define any notion of coloured paths on a manifold.