On the regularity of axisymmetric, swirl-free solutions of the Euler equation in four and higher dimensions

In this talk, I will discuss the axisymmetric, swirl-free Euler equation in four and higher dimensions. I will show that in four and higher dimensions the axisymmetric, swirl-free Euler equation has properties which could allow finite-time singularity formation of a form that is excluded in three dimensions. I will also discuss a model equation that is obtained by taking the infinite-dimensional limit of the vorticity equation in this setup. This model exhibits finite-time blowup of a Burgers shock type. The blowup result for the infinite dimensional model equation strongly suggests a mechanism for the finite-time blowup of smooth solutions of the Euler equation in sufficiently high dimensions.