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$\begingroup$ Actually, note that I work in a fixed frame. What I mean by past and future is time before and after in that particular coordinate system $\endgroup$

Davidac897
– Davidac897

2011-04-27 01:16:33 +00:00
Commented Apr 27, 2011 at 1:16
$\begingroup$ @Davida897: It doesn't matter. In a particular frame also the concept of past and future (which event has taken place earlier and which latter) depends upon the causality. $\endgroup$

user1355
– user1355

2011-04-27 01:45:21 +00:00
Commented Apr 27, 2011 at 1:45

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