# Conformal mapping

1. Mar 12, 2010

### esisk

how do we describe the biholomorphic self maps of the multiply puncture plane onto itself?
I mean C\{pi,p2,p3..pn}

Plane with n points taken away.

I wanted to generailze the result for the conformal self maps of the punctured plane, but I do feel these are quite different animals.
I thank you for any help/suggestions

2. Mar 13, 2010

### g_edgar

The singularities (and infinity) are removable. So you need to map the sphere to itself (az+b)/(cz+d) in such a way that you permute the points $\{p_1,\dots,p_n,\infty\}$.

Last edited: Mar 13, 2010
3. Mar 13, 2010

### esisk

I thank you edgar,

I think I see it now. So I suspect we get the full symmetric group on n letters then, as the automorphism group. Thank you again