Nonlinear Sciences – Exactly Solvable and Integrable Systems
Scientific paper
2005-10-18
TMPh (Journal of Theoretical and Mathematical Physics) 147(3), pp. 839-846 (2006)
Nonlinear Sciences
Exactly Solvable and Integrable Systems
to appear in J. "Theor.Math.Phys." in May 2006
Scientific paper
We study invariants under gauge transformations of linear partial differential operators on two variables. Using results of BK-factorization, we construct hierarchy of general invariants for operators of an arbitrary order. Properties of general invariants are studied and some examples are presented. We also show that classical Laplace invariants correspond to some particular cases of general invariants.
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