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m (Dicklyon moved page Light cone coordinates to Lightcone coordinates) 
m (correct minus sign in superscript) 

with <math>i,j=1,\dots,d1</math>, <math>x^+=\frac{t+x}{\sqrt{2}}</math> and <math>x^=\frac{tx}{\sqrt{2}}</math>.
Both x<sup>+</sup> and x<sup>
One nice thing about light cone coordinates is that the causal structure is partially included into the coordinate system itself.
