An asymptotic expansion for a Lambert series associated to Siegel cusp forms

Babita, Abhash Kumar Jha, Abhishek Juyal +1

In 2000, Hafner and Stopple proved a conjecture of Zagier which states that the constant term of the automorphic function $|\Delta (x+iy){|}^2$ i.e., the Lambert series $\sum_{n=1}^\infty…