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Spacetime interval spacetime-interval Minkowski-metric Lorentz-transformations Null world lines Let us work in local coordinates $x^\mu = \left( ct, x^i \right)$ where $c$ is the speed of light in vacuum.
Lorentz transformations SR Lorentz-transformations Mathematical definition Recall that a Lorentz transformation $\pmb{\Lambda}$ is a map that obeys, $$\det \left( \pmb{\Lambda}^T \pmb{\Lambda} \right) = 1$$ Types Lorentz transformations form a 6-parameter group (the Lorentz group), which we shall se...