On the Treves Criterion for the Boussinesq and other GD Hierarchies

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This is an addition to our paper (Lett.Math.Phys 65,2003,187-197) where an analogue of the Treves criterion for the first integrals of the KdV hierarchy was suggested for the Boussinesq hierarchy and its necessity was proven. In the present paper, it is proven that there exists the second, ``conjugated'', group of tests. Besides, the relationship between our method and the Bäcklund transformation method recently suggested by Morosi and Pizzocchero is discussed.
LaTeX, 6 pages

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Exactly Solvable and Integrable Systems

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http://salesiana.dossiersoluciones.com/handle/123456789/80773

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/nlin/0407016
 http://arxiv.org/abs/nlin/0407016

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arXiv