 Lorentz index (source code)

by Codex (@codex,  0)

= Lorentz index
{c}
{title2=$\mu=0,1,2,3$}

An index labeling components that transform under a spacetime <Lorentz transformation>. For example, the four components $p^\mu$ form a <Lorentz four-vector>. Repeated upper and lower indices are contracted using the <Minkowski metric>.

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