Abstract
Motivated by the initial-boundary value problem for the Einstein equations, we propose a definition of symmetric hyperbolicity for systems of evolution equations that are first order in time but second order in space. This can be used to impose constraint-preserving boundary conditions. The general methods are illustrated in detail in the toy model of electromagnetism.
- Received 3 March 2004
DOI:https://doi.org/10.1103/PhysRevD.70.044031
©2004 American Physical Society