Absence of solitons with sufficient algebraic localization for the   Novikov-Veselov equation at nonzero energy
  We show that the Novikov--Veselov equation (an analog of KdV in dimension 2 + 1) at positive and negative energies does not have solitons with the space localization stronger than O(|x|^{-3}) as |x| \to \infty. 
Anna Kazeykina (CMAP)
math.AP math-ph math.MP