We study obstructions for a quasi-regular mapping f : M -> N of finite degree between Riemannian manifolds to blow up on or collapse on a non-trivial part of the boundary of M.
Aude Billard, Iason Batzianoulis, Anqing Duan
Nicolas Boumal, Christopher Arnold Criscitiello
Daniel Kressner, Axel Elie Joseph Séguin