C. Lang

activity

20132021

most citedFibonacci Numbers and Identities II

7 citations · 11 across the 15 of their papers we have counts for

collaborators

Showing 2015Show all

2 papers · 1 filter

math.GR2015

Arithmetic and geometry of the Hecke groups

Cheng Lien Lang, Mong Lung Lang

We study the arithmetic and geometry properties of the Hecke group $G_{q}$ . In particular, we prove that $G_{q}$ has a subgroup $X$ of index $d$ , genus $g$ with $v_{\infty}$ cusps, a…

math.NT2015

Identifying normal and congruence subgroups

Cheng Lien Lang, Mong Lung Lang

We give a simple algorithm that enables us to determine whether a subgroup of finite index of the Hecke group is normal.