Some existence results for the modified binormal curvature flow equation

We establish existence and uniqueness results for the modified binormal curvature flow equation that generalizes the binormal curvature flow equation for a curve in ${\mathbb{R}}^3\mathrm{.}$ In this generalization, the velocity of the curve is still directed along the binormal vector, but the magnitude of the speed is allowed to depend on th parametrization of the curve, the time and the position of the point in the space. We achieve our objective via a generalized form of the Schr"odinger map equation.