Question: have some sense that in a space time with metric [tex]ds^2 = g_{tt}dt^2+ g_{xx}dx^2+ g_{yy}dy^2+g_{zz}dz^2[/tex], the coordinates [tex] x,y,z \in ]-\infty, \infty[ [/tex] , but [tex] t \in [0, \infty[ [/tex] ??????(adsbygoogle = window.adsbygoogle || []).push({});

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# Range of time

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