Waldspurger's_theorem
Waldspurger's theorem
Identifies Fourier coefficients of some modular forms with the value of an L-series
In mathematics, Waldspurger's theorem, introduced by Jean-Loup Waldspurger (1981), is a result that identifies Fourier coefficients of modular forms of half-integral weight k+1/2 with the value of an L-series at s=k/2.