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# Tag Archives: Hecke Group

## Lecture 13: Wednesday, September 18, 2013

In Lecture 11 and Lecture 12, we discussed examples of Riemann Surfaces and their relation with the Riemann Sphere . Today, we put things into perspective by considering the larger picture: we discuss tesselations of the upper half plane, covering … Continue reading

## Homework Assignment 2

Recall that the collection of Möbius transformations is the group while the (ordinary) triangle group is the set This homework set is meant to discuss the relationship with these two sets. This assignment is due Friday, September 20, 2013 at … Continue reading

Posted in MA 59800
Tagged Euler Characteristic, Genus, Hecke Group, Mobius Transformation, Modular Group, Principal Congruence Subgroup
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