Example
Tag 0793, permanent. Cite it as [Bourbaki, Tag 0793].
Topological Vector Spaces, I, p. 12, § 2. Linear varieties in a topological vector space
— 1) In the normed space (on the field ) of functions, continuous on , with values in , the restrictions to of the functions form a total set, by the Weierstrass-Stone theorem (GT, X, § 4.2, th. 3). Similarly, the restrictions to of the functions form a total set (GT, X, § 4.4, prop. 8), in the subspace of formed of functions such that .
2) Every absorbent set in a topological vector space over a non-discrete valued division ring (and in particular every neighbourhood of 0 in ) is a total set since it generates (I, p. 7). Thus a linear variety that is not dense in is necessarily a nowhere dense set in (GT, IX, § 5.1) since its closure cannot contain an interior point.
Bourbaki puts the proof directly after the statement, so what is above is the statement and its proof together.
Cited by
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Cites
- IX, § 5 not yet on this site
- X, § 4 not yet on this site