If the squared length of a 4-velocity is -1, how can you have a component v(adsbygoogle = window.adsbygoogle || []).push({}); ^{0}=0?

I've played with equation (2.35) and produced a result of v = γ(-u^{2}, -u^{1}, -u^{2}, -u^{3}), which doesn't have a squared length of -1.

Can anyone help out?

TerryW

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# Exercise 2.5 in Misner, Thorne and Wheeler

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