A new contraction family for porous medium and fast diffusion equation
  In this paper, we present a surprising two-dimensional contraction family for porous medium and fast diffusion equations. This approach provides new a priori estimates on the solutions, even for the standard heat equation. 
Ghada Chmaycem (CERMICS), R\'egis Monneau (CERMICS), Mustapha Jazar
math.AP