时间：2019年4月23日（星期二）13:00--14:00

地点：苏州大学本部精正楼307（数学科学学院）

摘要：Darren Long and Alan Reid defined a pseudo-modular surface to be a hyperbolic surface which has cusp set all of the rationals, but which is not commensurable to the modular surface. We will show how to construct pseudo-modular surfaces by piecing together suitable marked hyperbolic ideal triangle tiles. In particular, we will show that this allows us to construct infinitely non-commensurable Pseudo-modular surfaces, which answers a question of Darren Long and Alan Reid. This is joint work with Beicheng Lou and Vo Anh Duc.