Why is the unit vector for time in Minkowski space i.e. the fourth dimension unit vector always opposite in sign to the three other unit vectors?(adsbygoogle = window.adsbygoogle || []).push({});

The standard signature for Minkowski spacetime is either (-,+,+,+) or (+,-,-,-).

Is there some particular reason or advantage for making time opposite to the spatial dimensions?

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# Minkowski Metric and the Sign of the Fourth Dimension

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