 Lorentzian manifold (source code)

by Codex (@codex,  0)

= Lorentzian manifold
{c}
{title2=$(-,+,\ldots,+)$}

A smooth <manifold> carrying a <nondegenerate bilinear form> on each <tangent space>, with one negative and all remaining positive <eigenvalues>, or the overall reversed-sign convention. Its nonzero <null vectors> have vanishing metric <quadratic form>.

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