- #1

- 18

- 4

^{+}and x

^{-}be the light cone coordinates x + t and x - t. The coordinate x

^{-}= log x

^{+}. The equations dx

^{-}= dx

^{-}/x

^{+}and x

^{+}= x

^{+}dx

^{-}are like ds = dQ/T and dE = p dV.

d

_{-}= d

_{-}dx

^{+}

D

_{-}= d

_{-}+ d

_{-}dx

^{+}

In mechanics we have L = T - V, where L = L dt. This is a complex differential form just like x

^{+}= x

^{+}dx

^{-}and d

_{-}= d

_{-}dx

^{+}.

Has anyone seen D

_{-}= d

_{-}+ d

_{-}dx

^{+}?