Zagier, Don Max Planck Institute for Mathematics, Max Planck Society;
https://doi.org/10.1007/s40687-018-0159-8 (Publisher version)
Lewis-Zagier_Cotangent sums, quantum modular forms, and the generalized Riemann hypothesis_2019.pdf (Publisher version), 3MB
Lewis, J., & Zagier, D. (2019). Cotangent sums, quantum modular forms, and the generalized Riemann hypothesis. Research in the Mathematical Sciences, 6(1): 4. doi:10.1007/s40687-018-0159-8.