Additional symmetries and solutions of the dispersionless KP hierarchy
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2003
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American Institute of Physics
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Abstract
The dispersionless KP hierarchy is considered from the point of view of the twistor formalism. A set of explicit additional symmetries is characterized and its action on the solutions of the twistor equations is studied. A method for dealing with the twistor equations by taking advantage of hodograph type equations is proposed. This method is applied for determining the orbits of solutions satisfying reduction constraints of Gelfand-Dikii type under the action of additional symmetries.
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©2003 American Institute of Physics.
The authors are grateful to Professor F. Guil for showing them the relevance of enerating functions for canonical transformations of twistor data to get solutions of the dKP hierarchy. This work was partially supported by CICYT Project No. BFM2002-01607.