Unified description of interactions in terms of composite fiber bundles

We claim that a composite fiber bundle satisfactorily serves as the geometrical structure underlying gauge theories of spacetime groups, such as the Poincare gauge theory. A trivial extension of the approach to include internal symmetries also provides a unique mathematical scheme in which gravitation and the remaining forces are put together and treated in a common fiber bundle language. The result is a homogeneous characterization of interactions, gravity included, exclusively by means of connections