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- W2950347812 abstract "Each conservation law of a given partial differential equation is determined (up to equivalence) by a function known as the characteristic. This function is used to find conservation laws, to prove equivalence between conservation laws, and to prove the converse of Noether's Theorem. Transferring these results to difference equations is nontrivial, largely because difference operators are not derivations and do not obey the chain rule for derivatives. We show how these problems may be resolved and illustrate various uses of the characteristic. In particular, we establish the converse of Noether's Theorem for difference equations, we show that the infinite family of conservation laws generated by Rasin and Schiff using the Gardner transformation are distinct (without taking a continuum limit), and we obtain all five-point conservation laws for the potential Lotka-Volterra equation." @default.
- W2950347812 created "2019-06-27" @default.
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- W2950347812 date "2012-12-17" @default.
- W2950347812 modified "2023-09-27" @default.
- W2950347812 title "Characteristics of conservation laws for difference equations" @default.
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