Definition of Bordered 3 manifold

Bordered 3 manifold with connected boundary is where is a homeomorphism between and .

Definition: Equivalence of bordered 3 manifolds

Two bordered 3 manifolds and are equivalent if there is an orientation-preserving homeomorphism such that the following diagram commutes.


Definition.
A bordered 3-manifold is .

Definition.
Two bordered 3-manifolds and are equivalent if there is an orientation-preserving homeomorphism making the diagram commute.