Talk:Generalized Poincaré conjecture
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The categories need references. In particular, Diff, the category of differential manifolds and their morphisms, needs linking. —Preceding unsigned comment added by 200.122.159.125 (talk • contribs)
This article has come a long way (great job to everyone involved!), so I am removing the context tag. --C S (Talk) 21:38, 21 April 2007 (UTC)
Smooth
[edit]The terms "smooth" and "differentiable" appear without explanation of the difference, if any. If they are two words for the same thing, this should be stated here. Note that "smooth" has various meanings. Zaslav (talk) 08:47, 11 September 2021 (UTC)