Recent content by jaljon

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bcrowell, DalesPam, robphy Thank you very much my queastion is if I use first one ds^2 =-(cdt)^2+(dX)^2 spacelike: (ds^2>0) then -(cdt)^2+(dX)^2>0 then (dX/dt)>c if I use second one ds^2 =(cdt)^2-(dX)^2 spacelike: (ds^2>0) then (cdt)^2-(dX)^2>0 then (dX/dt)<c we...

[SIZE="3"]hello Whic one of these to metric are Minkowski metric ds^2 =-(cdt)^2+(dX)^2 ds^2 =(cdt)^2-(dX)^2 and what about timelike (ds^2<0) and spacelike (ds^2>0) for each metric? With my appreciation to those who answer