Examples of orientable

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It should be pointed out that maps are confined to orientable surfaces only, and that they are assumed to be endowed with a fixed orientation.
Let us show now how to extend this result to non-orientable closed surfaces.
Proofnets may be seen as orientable surfaces with boundary.
R is located at the center of the orientable wheel will be considered.
In particular, a differential with at least one simple pole or one simple zero is not orientable.
A dimension-one orientable foliation is usually called a flow yet without considering any parametrization.
For a closed orientable manifold we have the following.
In this work, singular orientable foliations which admit non-trivial recurrent leaves on 2-manifolds of finite or infinite genus are considered.
We also compute the first leafwise cohomology of the stable foliation of geodesic flows of closed orientable surfaces of constant negative curvature.
Let be a compact, orientable surface of positive-genus with obtained by identifying the boundary non-empty boundary.
We denote by 2 the compact orientable surface of genus two.
Taking again, if necessary, a 2-cover we can assume the foliation to be orientable.
It is proved that some known families of snarks have no (orientable) polyhedral embeddings.
This diffeomorphism is not structurally stable, and its stable and unstable foliations are not orientable.

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