Skip to main content
7 events
when toggle format what by license comment
Nov 18, 2014 at 19:25 history edited Ryan Budney CC BY-SA 3.0
a little more detail on the "promotion" step.
Oct 24, 2014 at 20:59 comment added Ryan Budney Yes, that PL 3-manifolds admit unique smooth structures is an old theorem. I think perhaps Munkres was maybe the first to observe this in 1960 but it might go back further. Munkres result applies in any dimension. He formulated his work in the language of obstruction theory. I think Thurston gives a write-up of his version of this result in his book. You could also approach this from the Kirby-Siebenmann perspective. Hamilton gave a proof that 3-manifolds have unique PL structures and smoothings this way in 1976. See: math.cornell.edu/~hatcher/Papers/TorusTrick.pdf
Oct 24, 2014 at 20:51 vote accept Malte
Oct 24, 2014 at 20:51 comment added Malte Thanks, this looks like exactly what I was looking for! I must admit I am still wondering how Moise's theorem implies that every 3-manifold has a unique smooth structure – it seems that every PL 3-manifold needs a unique smooth structure then – but this should be traceable even by me (or so I hope).
Oct 24, 2014 at 20:29 history edited Ryan Budney CC BY-SA 3.0
rewrite it to be more direct.
Oct 24, 2014 at 20:20 history edited Ryan Budney CC BY-SA 3.0
added 308 characters in body
Oct 24, 2014 at 20:09 history answered Ryan Budney CC BY-SA 3.0