Abstract
We prove that strongly continuous groups generated by first order systems on Riemannian manifolds have finite propagation speed. Our procedure provides a new direct proof for self-adjoint systems and allows an extension to operators on metric measure spaces. As an application, we present a new approach to the weak Huygens' principle for second order hyperbolic equations.
| Original language | English |
|---|---|
| Pages (from-to) | 3515-3527 |
| Number of pages | 13 |
| Journal | Proceedings of the American Mathematical Society |
| Volume | 141 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 2013 |