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Timeline for Wick rotation and spinors

Current License: CC BY-SA 3.0

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Apr 17, 2016 at 13:21 comment added Alex Shpilkin This “change of variables” is imaginary, and this means we can no longer be using $\mathrm{SO}(3,1)$, which is a real group. We can either use the complex version, the rather unfamilliar ${}^{\mathbf C}\mathrm{SO}(3,1) = \mathrm{SO}(4,\mathbf C)$, or choose an appropriate real version of it, which is exactly $\mathrm{SO}(4)$. (You can’t always get away with being cavalier about complexifications.)
Nov 9, 2014 at 15:38 history answered Peter CC BY-SA 3.0