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Nov28-11, 06:08 AM
Sci Advisor
PF Gold
Fredrik's Avatar
P: 9,420
I think it's usually just the components of a Lorentz transformation, but you shouldn't assume that every author uses that convention.

I'm not a fan of the [itex](\Lambda^\mu{}_\nu)[/itex] notation. I assume it denotes the matrix with [itex]\Lambda^\mu{}_\nu[/itex] on row [itex]\mu[/itex], column [itex]\nu[/itex]? I would just write [itex]\Lambda[/itex].

Note that in most books, the horizontal positioning of the indices is important.