Decomposition of higher order equations of Monge-Ampere type

Details Decomposition of higher order equations of Monge-Ampere type Decomposition of higher order equations of Monge-Ampere type

2002-05-26

arxiv.org/abs/nlin/0205056v1

Nonlinear Sciences

Exactly Solvable and Integrable Systems

6 pages

Scientific paper

Given a function f(x, t), its fourth (symmetric) differential is a quartic form in dx, dt. It is well-known that any quartic form in two variables can be represented as a sum of three 4th powers of linear forms. The particular case of two 4th powers is characterized by the vanishing of a catalecticant determinant, which is a fourth order PDE for the function f. We demonstrate that this PDE decouples in a direct sum of two Monge-Ampere equations. A higher order generalization of this decomposition is also proposed.

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