Remark
Tag 09SA, permanent. Cite it as [Bourbaki, Tag 09SA].
Integration, chapter IX, § 6. Promeasures and measures on a locally convex space
— When is finite-dimensional, every character of is of the form with (Théor. spect., Ch. II, §1, No. 9, Cor. 3 of Prop. 12). In this case, Prop. 3 follows from the uniqueness theorem for the Fourier transformation (loc. cit., §1, No. 6, Cor. of Prop. 6).*
Bourbaki puts the proof directly after the statement, so what is above is the statement and its proof together.
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