Existence and stability of discretely self-similar blowup for a wave maps type equation

Irfan Glogić, David Hilditch, David Wallauch

We study finite-time blowup for a nonlinear wave equation for maps from the Minkowski space ${\mathbb{R}}^{1+d}$ into the 1-sphere ${\mathbb{S}}^1$, whose nonlinearity exhibits a null-…