On quadrilaterals in the suborbital graphs of the normalizer
Serkan Kader, Bahadır Özgür Güler, Elif Akşit · DOAJ (DOAJ: Directory of Open Access Journals) · 2020
n this paper, we investigate suborbital graphs formed by $N\big(\Gamma_0(N)\big)$-invariant equivalence relation induced on $\hat{\mathbb{Q}}$. Conditions for being an edge are obtained as a main tool, then necessary and sufficient conditions for the suborbital graphs to contain a circuit are investigated.