# Mobius maps form a Simple group

1. Jun 17, 2010

### AlbertEinstein

Hi all,

How do I prove that the set of all Mobius Maps form a simple group, that is they have no non-trivial subgroup? How can I characterize a non-trivial subgroup? Hints will be welcome.

Thanks

2. Jun 20, 2010

### AlbertEinstein

hi guys, plz help.