Stable blow-up solutions for the $SO(d)$-equivariant supercritical Yang-Mills heat flow (2112.13325v1)

Abstract: We consider the $SO(d)$-equivariant Yang-Mills heat flow \begin{equation*} \partial_t u-\partial_r^2 u-\frac{(d-3)}{r}\partial_r u+\frac{(d-2)}{r^2}u(1-u)(2-u)=0 \end{equation*} in dimensions $d>10.$ We construct a family of $\mathcal{C}^{\infty}$ solutions which blow up in finite time via concentration of a universal profile \begin{equation*} u(t,r)\sim Q\left(\frac{r}{\lambda(t)}\right), \end{equation*}where $Q$ is a stationary of the equation and the blow-up rates are quantized by \begin{equation*} \lambda(t)\sim c_{u}(T-t)^{\frac{l}{\gamma}},\,\,\,l\in \mathbb{N}_{+},\,\,\,2l>\gamma\in (1,2). \end{equation*} Moreover, such solutions are in fact $(l-1)$-codimension stable under pertubation of the initial data. In particular, the case $l=1$ corresponds to a stable blow-up regime.