Lorentz group
Noun
Meaning
Lorentz group
(physics, mathematics) The group of all Lorentz transformations in spacetime.
Examples
Classification of the homogeneous Lorentz group From the invariance of the spacetime interval it follows immediately : and this matrix equation contains the general conditions on the Lorentz transformation to ensure invariance of the spacetime interval.
That is, in pure matrix notation, : This means exactly that covariant vectors (thought of as column matrices) transform according to the dual representation of the standard representation of the Lorentz group.
The full Lorentz group O(3, 1) also contains special transformations that are neither rotations nor boosts, but rather reflections in a plane through the origin.
The group of Lorentz transformations consisting only of boosts and rotations is called the "restricted Lorentz group", and is the special indefinite orthogonal group SO(3,1).
The set of Poincaré transformations also satisfy the properties of a group and is called the Poincaré group or inhomogeneous Lorentz group.