Cusp forms of weight 1/2 and pairs of quadratic forms
arXiv:2507.02522
Abstract
We prove a spectral summation formula for the product of four Fourier coefficients of half-integral weight cusp forms in Kohnen's subspace. The other side of the formula involves certain generalized class numbers of pairs of quadratic forms with integer coefficients.
A new theorem (Theorem 1.2) is added