I understand that GR allows for a method of time travel using closed time like curves (CTC)s. anyway i have a few question about this, first of is there some sort of (relativaly short) equation that discribes this. So my second question is based of a something i read in this thesis paper (http://digitalcommons.bucknell.edu/cgi/viewcontent.cgi?article=1083&context=honors_theses Part2.7) It stated mentioned something called "time-like 4-velocities" what is this and and how is it calculated.(adsbygoogle = window.adsbygoogle || []).push({});

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# Closed time like curves

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