4 problems

For a $phi^4$ graph, namely a 4-regular graph $G$, let $c_2(G)$ denote its $c_2$ invariant. Curves in the geometry associated with $c_2(G)$ correspond to weight-2 modular forms. Cu…

Semilinear reducibility conjecture. For every $h\geq 3$, the graph $\widehat{ZZ}_h$ is semilinearly reducible and, for every $q$ with no primes of bad reduction,

Zigzag completion conjecture. For every $h\geq 3$, the completion $\widehat{ZZ}_h$ is semilinearly reducible and, for every $q$ with no primes of bad reduction,

Completion conjecture. If