# Dominant energy condition and causality for Skyrme-like generalizations of the wave-map equation

Research paper by Willie Wai-Yeung Wong

Indexed on: 15 Nov '10Published on: 15 Nov '10Published in: Mathematical Physics

#### Abstract

It is shown in this note that a class of Lagrangian field theories closely related to the wave-map equation and the Skyrme model obeys the dominant energy condition, and hence by Hawking's theorem satisfies finite speed of propagation. The subject matter is a generalization of a recent result of Gibbons.