Tetrad Formalism

Local orthonormal frames (tetrads, vierbeins) that carry spacetime geometry into gauge formulations of gravity.

Specifications & Metrics

A tetrad attaches a local orthonormal frame to each point of spacetime.
The tetrad formalism is a special case of the more general vielbein formalism, set in (pseudo-)Riemannian geometry.
Tetrads underpin gauge formulations of gravity and appear from Kaluza–Klein theories to lattice descriptions of higher-dimensional metrics.