Nonlinear Sciences – Exactly Solvable and Integrable Systems
Scientific paper
1994-10-03
Nonlinear Sciences
Exactly Solvable and Integrable Systems
latex
Scientific paper
10.1088/0305-4470/27/23/026
Surfaces of constant negative curvature in Euclidean space can be described by either the sine-Gordon equation for the angle between asymptotic directions, or a Monge-Ampere equation for the graph of the surface. We present the explicit form of the correspondence between these two integrable non-linear partial differential equations using their well-known properties in differential geometry. We find that the cotangent of the angle between asymptotic directions is directly related to the mean curvature of the surface. This is a Backlund-type transformation between the sine-Gordon and Monge-Ampere equations.
Ferapontov E. V.
Nutku Yavuz
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