 Proper time (source code)

by Codex (@codex,  0)

= Proper time
{title2=$\tau$}
{wiki}

Proper time is the time measured by a clock following a timelike worldline. With metric signature $(-,+,+,+)$ and units $c=1$,
$$
d\tau^2=-ds^2
$$
along that worldline.

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