Let us say there is a curved region of spacetime whose curvature is [tex]\kappa(s)[/tex]. How does one find the coordinates of the unit vector normal to a certain point on the region of spacetime? I tried searching(adsbygoogle = window.adsbygoogle || []).push({}); Hamilton's principle and the general theory of relativitybut I could not find any equation which describes the coordinates of the normal vector to the curved region of spacetime.

Thanks.

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# The unit vector normal to the curvature of spacetime

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