Minkowski Metric

#Physics

$$

\eta^{\mu \nu}=\begin{bmatrix}
-1 & 0 & 0 & 0 \\0 & 1 & 0 & 0 \\0 & 0 & 1 & 0 \\0 & 0 & 0 & 1
\end{bmatrix}
$$

• Used to set the d'Alembert operator into hyperbolic spacetime geometry
• Alternatively negative as + - - - instead of - + + +