Classification of integrable Weingarten surfaces possessing an sl(2)-valued zero curvature representation

Details Classification of integrable Weingarten surfaces possessing an sl(2)-valued zero curvature representation Classification of integrable Weingarten surfaces possessing an sl(2)-valued zero curvature representation

2010-02-04

arxiv.org/abs/1002.0992v1

Nonlinear Sciences

Exactly Solvable and Integrable Systems

Scientific paper

In this paper we classify Weingarten surfaces integrable in the sense of soliton theory. The criterion is that the associated Gauss equation possesses an sl(2)-valued zero curvature representation with a nonremovable parameter. Under certain restrictions on the jet order, the answer is given by a third order ordinary differential equation to govern the functional dependence of the principal curvatures. Employing the scaling and translation (offsetting) symmetry, we give a general solution of the governing equation in terms of elliptic integrals. We show that the instances when the elliptic integrals degenerate to elementary functions were known to nineteenth century geometers. Finally, we characterize the associated normal congruences.

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