Perturbation of zeros of the Selberg zeta-function for ${\Gamma }_0(4)$

Roelof Bruggeman, Markus Fraczek, Dieter Mayer

We study the asymptotic behavior of zeros of the Selberg zeta-function for the congruence subgroup ${\Gamma }_0(4)$ as a function of a one-parameter family of characters tending to the tri…