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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.