Dominant energy condition and causality for Skyrme-like generalizations of the wave-map equation
arXiv:0909.4706
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.
arXiv commentDeprecated. Result absorbed in http://arxiv.org/abs/1011.3029