Recursion operators for a class of integrable third-order evolution equations

Details Recursion operators for a class of integrable third-order evolution equations Recursion operators for a class of integrable third-order evolution equations

2003-04-09

arxiv.org/abs/nlin/0304012v1

Nonlinear Sciences

Exactly Solvable and Integrable Systems

Scientific paper

We consider $u_t=u^{\alpha} u_{xxx}+n(u)u_xu_{xx}+m(u)u_x^3+ r(u)u_{xx} +p(u)u_x^2 + q(u)u_x+s(u)$ with $\alpha=0$ and $\alpha=3$, for those functional forms of $m, n, p, q, r, s$ for which the equation is integrable in the sense of an infinite number of Lie-B\"acklund symmetries. Local $x$- and $t$-independent recursion operators that generate these infinite sets of symmetries are obtained for the equations. A combination of potential forms, hodograph transformations and $x$-generalised hodograph transformations are applied to the obtained equations.

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