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Nov 14, 2017 at 3:42 comment added j0equ1nn This is the main book I studied for my PhD. Number fields and quaternion algebras arise naturally as invariants of commensurability classes of hyperbolic $3$-manifolds. In this theory the number theory is informing the topology. I think that usually people are looking for things to go in the other direction (use anything and everything you can to answer number theory problems), but the process of taking a purely arithmetic fact and using it to distinguish topological structures is really beautifully done in this book, and you can find many other articles on the topic too.
Jul 29, 2012 at 16:51 history made wiki Post Made Community Wiki by François G. Dorais
Jul 26, 2012 at 23:06 vote accept Steven
Jul 26, 2012 at 23:06
Jul 26, 2012 at 21:59 history answered Ryan Budney CC BY-SA 3.0