Primitive root bias for twin primes II: Schinzel-type theorems for totient quotients and the sum-of-divisors function

Stephan Ramon Garcia, Florian Luca, Kye Shi +1

Garcia, Kahoro, and Luca showed that the Bateman-Horn conjecture implies $\varphi (p-1)\ge \varphi (p+1)$ for a majority of twin-primes pairs $p,p+2$ and that the reverse inequality holds for…