Abstract
It is shown that the action of a special ‘rank 2’ or ‘rank 3’ Darboux transformation, called transference, upon a pair of commuting ordinary differential operators of orders 4 and 6 implements the Abelian sum on their elliptic joint spectrum. A consequence of this is that, under the deformation of these commuting operators by the KP flow, every ‘rank 2’ KP solution corresponds to a solution of the Krichever—Novikov (KN) equation, and vice versa, with the transference process providing the correspondence between (2 + 1) and (1 + 1) dimensions. For a singular joint spectrum, it is further shown that transference at the singular point produces a correspondence between solutions of the singular KN equation and those of the KdV equation. These correspondences are illustrated by considering examples of a nondecaying rational KdV or Boussinesq solutions and the corresponding rational, singular-KN and rational KP solutions which the transference process generates.
Mathematics Subject Classifications (1991): 58F07.
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Latham, G.A., Previato, E. (1995). Darboux Transformations for Higher-Rank Kadomtsev—Petviashvili and Krichever—Novikov Equations. In: Hazewinkel, M., Capel, H.W., de Jager, E.M. (eds) KdV ’95. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-0017-5_23
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DOI: https://doi.org/10.1007/978-94-011-0017-5_23
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