Bourbaki

Remark 3

Tag 07G3, permanent. Cite it as [Bourbaki, Tag 07G3].

Topological Vector Spaces, II, p. 40, § 5. Separation of convex sets

The restriction to XX of a continuous affine function in EE is a function that is affine in XX (i.e. both concave and convex II, p. 17); but it may be the case that there exist continuous affine functions in a compact convex set X⊂EX \subset E, that are not the restrictions to XX of continuous affine functions in EE (II, p. 78, exerc. II, c)). However :

Bourbaki puts the proof directly after the statement, so what is above is the statement and its proof together.

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Cites

Transcribed from the printed volume. Not translated.