Advances in Mathematical Physics
Volume 2009 (2009), Article ID 284689, 8 pages
Research Article

A Coding of Real Null Four-Momenta into World-Sheet Coordinates

Department of Mathematical Sciences, Durham University, South Road, Durham DH1 3LE, UK

Received 17 June 2008; Revised 2 September 2008; Accepted 7 October 2008

Academic Editor: Partha Guha

Copyright © 2009 David B. Fairlie. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The results of minimizing the action for string-like systems on a simply connected world sheet are shown to encode the Cartesian components of real null momentum four-vectors into coordinates on the world sheet. This identification arises consistently from different approaches to the problem.