## Existence and stability of traveling waves for an integro-differential equation for slow erosion.(English)Zbl 1320.35138

Summary: We study an integro-differential equation that describes the slow erosion of granular flow. The equation is a first order nonlinear conservation law where the flux function includes an integral term. We show that there exist unique traveling wave solutions that connect profiles with equilibrium slope at $$\pm \infty$$. Such traveling waves take very different forms from those in standard conservation laws. Furthermore, we prove that the traveling wave profiles are locally stable, i.e., solutions with monotone initial data approach the traveling waves asymptotically as $$t \to +\infty$$.

### MSC:

 35C07 Traveling wave solutions 35R09 Integro-partial differential equations 35L65 Hyperbolic conservation laws 35B35 Stability in context of PDEs 35L45 Initial value problems for first-order hyperbolic systems

### Keywords:

erosion of granular flow; monotone initial data
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