Abstract
On the basis of generalized Lagrange identity for pairs of formally adjoint multidimensional differential operators and a special differential geometric structure associated with this identity, we propose a general scheme of the construction of corresponding transformation operators that are described by nontrivial topological characteristics. We construct explicitly the corresponding integro-differential symbols of transformation operators, which are used in the construction of Lax-integrable nonlinear two-dimensional evolutionary equations and their Darboux–Bäcklund-type transformations.
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Prykarpats'kyi, Y.A., Samoilenko, A.M. & Samoilenko, V.H. Structure of Binary Transformations of Darboux Type and Their Application to Soliton Theory. Ukrainian Mathematical Journal 55, 2041–2059 (2003). https://doi.org/10.1023/B:UKMA.0000031664.23436.5a
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DOI: https://doi.org/10.1023/B:UKMA.0000031664.23436.5a