Absence of exponentially localized solitons for the Novikov--Veselov   equation at negative energy
  We show that Novikov--Veselov equation (an analog of KdV in dimension 2 + 1) does not have exponentially localized solitons at negative energy. 
Anna Kazeykina (CMAP), Roman Novikov (CMAP)
math-ph math.AP math.MP