G-fibration

A **G-fibration** is a concept in the field of algebraic topology, particularly in relation to homotopy theory and the study of fiber spaces. It is a generalization of the notion of a fibration, and it is typically associated with certain kinds of structured spaces and diagrams. In a broad sense, a G-fibration is a fibration where the fibers are not just sets but are equipped with a group action, typically from a topological group \( G \).