2 problems

Consider solutions $(\rho,u)$ of the pressureless Euler–Poisson system, where $\rho$ is the density and $u$ is the velocity. A solution undergoes $C^1$ blow-up when its $C^1$ regul…

Let $\rho$ and $u$ denote the density and velocity in the pressureless Euler–Poisson system, respectively, and let $T_\ast$ be the finite blow-up time. A measure-valued solution al…