Construction of a complex null tetrad
= Construction of a complex null tetrad
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In the context of general relativity and the study of spacetime, a null tetrad is a mathematical construct used to facilitate the analysis of light rays and the behavior of null (light-like) geodesics. A null tetrad consists of four vectors, typically denoted as \\( l^\\mu, n^\\mu, m^\\mu, \\) and \\( \\bar\{m\}^\\mu \\), which satisfy certain orthogonality and normalization conditions.