Z4

Z4 refers to a mathematical structure called a "group" used in physics and mathematics to describe certain symmetries, especially in areas like electromagnetism and particle physics. It consists of four elements that follow specific rules for combining (multiplying) and reversing (inverting) the elements. Think of it like four different ways to transform an object, where combining two transformations results in another. Z4 is simple but important for understanding systems with cyclic or repeating symmetry patterns, helping scientists analyze how objects or fields behave under these symmetry operations.