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.