In Euclidean three-space with coordinates [itex](x,y,z)[/itex] and line element(adsbygoogle = window.adsbygoogle || []).push({});

[tex]ds^2 = dx^2+dy^2-dz^2[/tex]

It is easy to show using the geodesic equation that:

[itex]x = lu+l'[/itex], [itex]y=mu+m'[/itex], [itex]z=nu+n'[/itex]

where [itex]u[/itex] is an affine parameter.

However, is it possible to find a relation between [itex]l,m,n[/itex]?

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# Relation between affine parameters

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