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Aug 20 at 17:48 comment added Ghoster Wikipedia: “A real vector space with an indefinite nondegenerate quadratic form of index $(p, q)$ (denoting $p$ $1$s and $q$ $−1$s) is often denoted as $\mathbf R^{p,q}$ particularly in the physical theory of spacetime.”
Aug 20 at 16:11 comment added Qmechanic Related Math.SE question: Equivalence of Two Lorentz Groups $O(3,1)$ and $O(1,3)$
Aug 20 at 16:09 history edited Qmechanic CC BY-SA 4.0
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Aug 20 at 16:05 comment added Prahar There is no standard convention. You should figure out the convention that Tong is using in his notes.
Aug 20 at 15:52 answer added paulina timeline score: 0
Aug 20 at 14:44 history asked MattHusz CC BY-SA 4.0