So-called "excitable" media support nonlinear waves that propagate as pulses, e.g., the action potential in nerve fibers and heart muscle, and the oxidation pulse in certain chemical reactions. In two ...

Differential equations are fundamental tools in physics: they are used to describe phenomena ranging from fluid dynamics to general relativity. But when these equations become stiff (i.e. they involve ...

This is a preview. Log in through your library . Abstract We establish the Strauss conjecture for nontrapping obstacles when the spatial dimension n is two. As pointed out by Hidano, Metcalfe, Smith, ...