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On the N-Solitons Solutions in the Novikov-Veselov Equation
We construct the -solitons solution in the Novikov-Veselov equation from
the extended Moutard transformation and the Pfaffian structure. Also, the
corresponding wave functions are obtained explicitly. As a result, the property
characterizing the -solitons wave function is proved using the Pfaffian
expansion. This property corresponding to the discrete scattering data for
-solitons solution is obtained in [arXiv:0912.2155] from the
-dressing method
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