Bourbaki

Exercise 1, § 2

Tag 02RA, permanent. Cite it as [Bourbaki, Tag 02RA].

Spectral Theories, III, p. 118

Let I=[a,b]I = [a, b] be a compact interval of R\mathbf{R}. For every continuous function f:I→Cf: I\rightarrow \mathbf{C} and every y∈Iy\in I, put

V(f)(y)=∫ayf(x)dx V(f)(y) =\int_a^yf(x)dx

Now prove that the linear mapping V from C(I)\mathscr{C}(I) into C(I)\mathscr{C}(I) is compact (« Volterra operator »).

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Machine translation of the English, by gpt-5-mini. Not checked by a person. That model is a cut down version of the one the rest of this language was written by.