Lecture notes explicitly credited to Andrew V. Sutherland and dated 8 November 2021. The author footer credits this individual lecture; MIT is the institutional host and Fall 2021 identifies the course offering.
Cited passages: Lecture 17, §17.1, Lemma 17.9 and proof, printed p. 3: differential-equation proof for the unit Gaussian; scaled here to a>0; Lecture 17, §17.1, Theorem 17.8 and proof, printed p. 3: periodization and Fourier coefficients.
