Multigeodesic tessellations

Geometry & Topology
Event time: 
Thursday, April 19, 2007 - 12:30pm to Wednesday, April 18, 2007 - 8:00pm
431 DL
Samuel Lelievre
Speaker affiliation: 
Orsay and Warwick
Event description: 

Consider finitely many copies of a Euclidean rectangle and identify
edges of these rectangles pairwise, using translations or half-turns.
The result is a Riemann surface S equiped with a locally flat metric
for which the tessellation formed by the rectangles is naturally geodesic.

One can also define on S other metrics, in particular (possibly singular)
hyperbolic metrics for which the above tessellation is also geodesic in
the sense that the edges of the rectangles are geodesic arcs for these

In many cases the tiling by rectangles allows to recover an equation for
the corresponding algebraic curve, providing a bridge between the algebraic
equation and the hyperbolic structure deduced from the multigeodesic
tessellation; in other words solving the uniformization problem for such