Jun Bo Lau

collaborators

2 papers

math.NT2025

Zeta functions of abstract isogeny graphs and modular curves

Jun Bo Lau, Travis Morrison, Eli Orvis +2

We introduce a ``non-orientable'' variation of Serre's definition of a graph, which we call an abstract isogeny graph. These objects capture the combinatorics of the graphs $G(p,\e…

math.NT2025

Genus formulas for families of modular curves

Asimina S. Hamakiotes, Jun Bo Lau

For each open subgroup $H \leq GL_{2} (Z)$ , there is a modular curve $X_{H}$ , defined as a quotient of the full modular curve $X (N)$ , where $N$ is the l…