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On the Geometry of Bäcklund Transformations

M. Palese, E. Winterroth

math.AParXiv:math/0311166

Abstract

The geometry of an admissible Bäcklund transformation for an exterior differential system is described by an admissible Cartan connection for a geometric structure on a tower with infinite--dimensional skeleton which is the universal prolongation of a |1|--graded semi-simple Lie algebra.

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