Just a quick question. Suppose we are considering a (1+1) spacetime. Are all vector fields hypersurface orthogonal? I think the answer is yes, since in the formula [tex]\xi_{[a}\partial_b \xi_{c]}[/tex], two indices will always be the same, which I think automatically makes the expression equal to zero, but am just seeking clarification!(adsbygoogle = window.adsbygoogle || []).push({});

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# Homework Help: Hypersurface orthogonality

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