Editing Whitney embedding theorem (section)

==History==
{{see also|History of manifolds and varieties}}
The occasion of the proof by [[Hassler Whitney]] of the embedding theorem for smooth manifolds is said (rather surprisingly) to have been the first complete exposition of the ''manifold concept'' precisely because it brought together and unified the differing concepts of manifolds at the time: no longer was there any confusion as to whether abstract manifolds, intrinsically defined via charts, were any more or less general than manifolds extrinsically defined as submanifolds of Euclidean space.  See also the [[history of manifolds and varieties]] for context.