Lightcone coordinates: Difference between revisions
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Assume we're working with a (d,1) Lorentzian signature.
Instead of the standard coordinate system (using [[Einstein notationEinstein notation]])
:<math>ds^2=dt^2+\delta_{ij}dx^i dx^j</math>,
with <math>i,j=1,\dots,d</math> we have
:<math>ds^2=2dx^+dx^ + \delta_{ij}dx^i dx^j</math>
with <math>i,j=1,\dots,d1</math>, <math>x^+=\
Both x<sup>+</sup> and x<sup></sup> can act as "time" coordinates.
