On B\"acklund correspondences
Sbornik. Mathematics, Tome 64 (1989) no. 1, pp. 277-293

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In the framework of a geometric approach to nonlinear systems of partial differential equations, a Bäcklund correspondence is defined according to a representation of it as a differential connection between two such systems, and a construction of it is presented. Examples of the practical realization of this construction are given. Bibliography: 7 titles.
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     title = {On {B\"acklund} correspondences},
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V. V. Zharinov. On B\"acklund correspondences. Sbornik. Mathematics, Tome 64 (1989) no. 1, pp. 277-293. http://geodesic.mathdoc.fr/item/SM_1989_64_1_a16/