Hierarchy of general invariants for bivariate LPDOs
classification
🌊 nlin.SI
keywords
invariantsgeneralhierarchyoperatorssomearbitrarybivariatebk-factorization
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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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