Proof of conjecture regarding the level of Rose’s generalized sum-of-divisor functions
© The Author(s) 2015
Received: 8 July 2015
Accepted: 3 August 2015
Published: 2 December 2015
In a recent paper, Rose proves that certain generalized sum-of-divisor functions are quasi-modular forms for some congruence subgroup and conjectures that these forms are quasi-modular for Γ 1(n). Here, we prove this conjecture.