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Bäcklund transformations from painlevé analysis

Published online by Cambridge University Press:  19 July 2002

Robert Conte
Affiliation:
Service de physique de l'état condensé, CEA Saclay, F–91191 Gif-sur-Yvette Cedex, France e-mail: [email protected]
Micheline Musette
Affiliation:
Dienst Theoretische Natuurkunde, Vrije Universiteit Brussel, B–1050 Brussel, België e-mail: [email protected]
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Abstract

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Since its elaboration in 1983 by Weiss, Tabor and Carnevale, the method to explicitly build the Bäcklund transformation of a partial differential equation (PDE) from singularity analysis only has been improved in several complementary directions, and at the present time it succeeds for practically all PDEs in 1+1-dimensions. The current state of the art is presented, and the emphasis is put on understanding the method. There are two important stages: first, the definition (identified with a Darboux transformation) of a resummation variable to make the Laurent series a finite one as requested by the definition of the word integrability; second, the link (identified with a linearizing formula to be taken from the classification of Painlevé and Gambier) between this resummation variable and the Lax pair to be found.

Type
Research Article
Copyright
© 2001 Glasgow Mathematical Journal Trust