Universality of the blow-up profile for small type II blow-up solutions of the energy-critical wave equation: the nonradial case (Q713953)

In this very nice paper under review and following previous papers due to the authors in the radial case, they consider type II blow-up solutions to the energy-critical focusing wave equation. The result reads as follows: Let \(W\) be the unique radial positive stationary solution of the equation. Up to the symmetries of the equation, under a suitable smallness assumption, any type II blow-up solution is asymptotically a regular solution plus a rescaled Lorentz transform of \(W\) concentrating at the origin.