Author： Musso Emilio Nicolodi Lorenzo
Publisher： IOP Publishing
ISSN： 0951-7715
Source： Nonlinearity, Vol.23, Iss.9, 2010-09, pp. : 2117-2129
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Abstract
The local motion of a null curve in Minkowski 3-space induces an evolution equation for its Lorentz invariant curvature. Special motions are constructed whose induced evolution equations are the members of the Korteweg–de Vries (KdV) hierarchy. The null curves which move under the KdV flow without changing shape are proven to be the trajectories of a certain particle model on null curves described by a Lagrangian linear in the curvature. In addition, we show that the curvature of a null curve which evolves by similarities can be computed in terms of the solutions of the second Painlevé equation.
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