## Riemann Surfaces

General domains of analytic functions of one complex variable. Surfaces are
locally described by holomorphic functions.
For example, a model of a concrete Riemann surface may be given as a
triangular or rectangular mesh of a branched covering of a planar domain.

#### References

- L.V. Ahlfors, L. Sario:
*Riemann Surfaces*, Princeton University Press (1960).
- Otto Forster:
*Riemannsche Flächen*, Springer (1997).
- Hermann Weyl:
*Die Idee der Riemannschen Fläche*, Teubner (1955).

#### Technical
Note

As a guide, meshes should have no holes, no degenerate triangles and
elements, no duplicate vertices. Surfaces should have meshes with an adjacency
relation.