Low regularity solutions for the two-dimensional "rigid body +   incompressible Euler" system
  In this note we consider the motion of a solid body in a two dimensional incompressible perfect fluid. We prove the global existence of solutions in the case where the initial vorticity belongs to $L^p$ with $p>1$ and is compactly supported. We do not assume that the energy is finite. 
Olivier Glass (CEREMADE), Franck Sueur (LJLL)
math.AP