Definition:Fiber Bundle

Definition
Let $M, E, F$ be topological spaces.

Let $\pi: E \to M$ be a continuous surjection.

Let $\mathcal U := \left\{ {U_\alpha \subseteq M: \alpha \in I} \right\}$ be an open cover of $M$ with index set $I$.

Let $\operatorname{pr}_{1, \alpha} : U_\alpha \times F \to U_\alpha$ be the first projection on $U_\alpha \times F$.

Let there exist homeomorphisms:


 * $\chi_\alpha : \pi^{-1} \left({U_\alpha}\right) \to U_\alpha \times F$

such that for all $\alpha \in I$:


 * $\pi {\restriction}_{U_\alpha} = \operatorname{pr}_{1, \alpha} \mathop \circ \chi_\alpha$

where $\pi {\restriction}_{U_\alpha}$ is the restriction of $\pi$ to $U_\alpha \in \mathcal U$.

Then the ordered tuple $\left({E, M, \pi, F}\right)$ is called a fiber bundle.

Also see

 * Definition:Total Space


 * Definition:Base Space


 * Definition:Model Fiber


 * Definition:Base Point


 * Definition:Fiber (Relation)


 * Definition:Bundle Projection


 * Definition:Local Trivialization


 * Definition:Local Triviality


 * Definition:Transition Map


 * Definition:Section (Topology)