What makes a Lie group a real Lie group?(adsbygoogle = window.adsbygoogle || []).push({});

I see on the Wikipedia page http://en.wikipedia.org/wiki/Lie_group "Areal Lie groupis a group that is also a finite-dimensional real smooth manifold" So when is a manifold arealmanifold?

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# What does it mean to say a Lie group is real?

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