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Many interfacial phenomena in physical and biological systems are dominatedby high order geometric quantities such as curvature.  Here a semi-implicit method is combined with a level set jet scheme to handlestiff nonlinear advection problems.  The new method offers an improvement over the semi-implicit gradientaugmented level set method previously introduced by requiring only onesmoothing step when updating the level set jet function while still preservingthe underlying methods higher accuracy. Sample results demonstrate thataccuracy is not sacrificed while strict time step restrictions can be avoided.

Level Set Jet Schemes for Stiff Advection Equations: The SemiJet Method