Four-vector
= Four-vector
{wiki=Four-vector}
A four-vector is a mathematical object used in the theory of relativity, which combines space and time into a single entity. In the context of physics, four-vectors help simplify the description of physical phenomena in a way that respects the principles of special relativity. A four-vector has four components, typically denoted as \\( V^\\mu \\), where \\( \\mu = 0, 1, 2, 3 \\).