*in which we find out about permutation properties of Möbius maps and start looking at cross-ratios.
*

# fixed points

# Groups Lecture 21

*in which we view Möbius maps via matrices, and compose geometrically meaningful maps.
*

# Groups Lecture 23

*in which we find out about fixed points and permutation properties of Möbius maps.
*

# Groups Lecture 22

*in which we view Möbius maps via matrices, and compose geometrically meaningful maps.
*