Removing discretely self-similar singularities for the 3D Navier-Stokes   equations
  We study the scenario of discretely self-similar blow-up for Navier-Stokes equations. We prove that at the possible blow-up time such solutions only one point singularity.   In case of the scaling parameter $ \lambda $ near $ 1$ we remove the singularity. 
Dongho Chae and Joerg Wolf
math.AP