fact: Definition f0eps (alpha : Z) (beta : nat) (epsilon : R) (B : R) := (-1) ^ beta * f (- 2 - alpha) beta (/ epsilon) B.
imports: Coq(Reals ZArith Psatz Fourier_util) Flocq(Raux) Coquelicot(Coquelicot AutoDerive) mathcomp.ssreflect(ssreflect ssrfun ssrbool ssrnat bigop) Stdlib Coquelicot Xreal Interval