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## Main Question or Discussion Point

In working with these vierbein fields I've come across these terms such as [itex]e^{aμ}[/itex][itex]e^{μ}_{a}[/itex] where the e's are vierbein fields. The thing is I have no idea what this represents because of the repeated μ's.You can rewrite this with the local lorentz metric to raise and lower the a's and b's but you're still left with identical greek indices. Any help would be greatly appreciated.