On $\mathbb{R}^n$, the Schwartz space is an incredibly nice space of functions, and in many ways is more natural than $C_c^\infty (\mathbb{R}^n)$. On a manifold $M$, it of course still makes sense to talk about $C_c^\infty(M)$, but what about $\mathcal{S}(M)$, the Schwartz space on $M$? Is there a way we can define this on a general smooth manifold $M$?
Schwartz Space on a Manifold
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manifolds
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1@YemonChoi Good idea. I have asked this question on MO as well: http://mathoverflow.net/questions/80094/the-schwartz-space-on-a-manifold – 2011-11-05