Well--posedness for the continuum Calogero--Moser equations by parabolic regularization

We prove that the focusing and defocusing continuum Calogero--Moser equations are globally well-posed in $H^s_+(\mathbb R)$ for every integer $s\geq 3$. In the focusing case, this requires the initial data to satisfy the mass condition $$\|q_0\|_{L^2}^2<2π.$$ Our proof is based on a parabolic regula