# Contractible noncompact 3-manifold without boundary not homeomorphic to $\Bbb R^3$

I heard this example was given in Whitehead's paper A CERTAIN OPEN MANIFOLD WHOSE GROUP IS UNITY.( http://qjmath.oxfordjournals.org/content/os-6/1/268.full.pdf ) But I was confused by his term. Thus I'm looking for an explanation in more standard terms about this example.

But since my aim is to know about an example of this kind, any alternative will do either.

-
@lethe: what is your question? What exactly would you like to know? (please reformulate your post so that it focuses on something specific that you would like to know). –  André Henriques Nov 24 '11 at 15:33
Sorry! I'm looking for a modern explanation about this example, but I wasn't so sure about whether the language is already "modern" in the original paper. Now it seems to be already settled...I didn't expect it can be just called "whitehead manifold"... Thanks all of you! –  Honglu Nov 25 '11 at 1:17