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Topological vector space with a locally convex topology, i.e. induced by a system of seminorms.

9 votes
2 answers
1k views

Test functions with "wrong" topology not locally convex?

I didn't find it in any book, although it seems that this should be standard: Endow the space $C^\infty_c(\mathbb{R})$ of compactly supported functions with the inductive topology coming from the embe …
Matthias Ludewig's user avatar
3 votes
1 answer
855 views

Measurability of subspace of set of all functions

Set $X=\mathbb{R}^n$ and let $X^{I}$, the space of maps from the (bounded or unbounded) interval $I$ to $X$, be endowed with the locally convex topology of pointwise convergence. Is it true that the …
Matthias Ludewig's user avatar
14 votes
2 answers
1k views

Are smooth functions tame?

I know the article of Hamilton on the inverse function theorem of Nash and Moser (with the same title) where he proves that $C^\infty(M)$ is a tame Fréchet space, when $M$ is closed or compact with bo …
Matthias Ludewig's user avatar
5 votes
0 answers
212 views

Tensors and Nuclear/Fredholm Operators

For a locally convex Hausdorff spaces $E$, consider the canonical map $$\overline{\psi}:E^\prime \hat{\otimes}_\pi E \longrightarrow L(E_\sigma)$$ that maps the projective tensor product to the space …
Matthias Ludewig's user avatar
3 votes
2 answers
348 views

Linear operators on distributions with different topologies

Denote by $\mathscr{D}^\prime$ and $\mathscr{D}^\prime_b$ the space of distributions on $\mathbb{R}^n$ equipped with the weak and the strong topology, respectively. Because the topology of $\mathscr{D …
Matthias Ludewig's user avatar