Coverings over Lax integrable equations and their nonlocal symmetries

H. Baran, I. S. Krasil'shchik, O. I. Morozov +1

Using the Lax representation with non-removable parameter, we construct two hierarchies of nonlocal conservation laws for the 3D rdDym equation $u_{ty}=u_x{u}_{xy}-u_y{u}_{xx}$ and…