Ym. Chen et L. Flaminio, REMOVABILITY OF THE SINGULAR SET OF THE HEAT-FLOW OF HARMONIC MAPS, Proceedings of the American Mathematical Society, 124(2), 1996, pp. 513-525
We show that the singular set of a weak stationary solution u of the h
eat flow of harmonic maps between Riemannian manifolds M and N, with N
compact, is removable if it has ''parabolic codimension'' greater tha
n two and the initial energy E(u(0)) is sufficiently small.