Remark 1

Tag 08DA, permanent. Cite it as [Bourbaki, Tag 08DA].

Functions of a Real Variable, chapter IV, § 2. LINEAR DIFFERENTIAL EQUATIONS

Some of the polynomials $f_j(D)$ may reduce to nonzero constants; the corresponding $y_j$ are then completely determined.

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

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