Some properties of $\lambda$ - solitons
  We investigate some dynamical parameters of $\lambda$ - solitons which arises in the family of implicit difference schemes for the diffusion equation with fractional difference operator $ \frac{{\partial ^2}}{{\partial x^2}}$ and imaginary diffusion coefficient. We suppose that such schemes may correspond to fractional diffusion equation with imaginary diffusion coefficient. 
V. V. Makhro, I. G. Makhro