Riemann-Lebesgue lemma

(redirected from Riemann lemma)

Riemann-Lebesgue lemma

[′rē‚män lə′beg ‚lem·ə]
(mathematics)
If the absolute value of a function is integrable over the interval where it has a Fourier expansion, then its Fourier coefficients an tend to zero as n goes to infinity.