|ISSN 1088-6850(online) ISSN 0002-9947(print)|
Two methods of integrating Monge-Ampère's equations. II
Abstract: Generalizing the notion of an integrable system given in the previous note , we shall define an integrable system of higher order, and obtain the following results:
1. A linear hyperbolic equation is solved by integrable systems of order n if and only if its th Laplace invariant vanishes.
2. An equation of Laplace type is solved by integrable systems of the second order if and only if the transformed equation by the associated Imschenetsky transformation is solved by integrable systems of the first order.
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