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Vanilla 1.1.10 is a product of Lussumo. More Information: Documentation, Community Support.
created smooth structure
(also created differentiable manifold and added hyperlinks to the various notions in the Idea-section of manifold)
dug out reference by Stallings where it is originally (I think) proven that in $d \neq 4$ there is a unique smooth structure on $\mathbb{R}^4$. Added theorem and reference to smooth structure.
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