I-Shou University

output

20132021

most citedIntrapapillary Capillary Loop Classification in Magnification Endoscopy: Open Dataset and Baseline Methodology

31 citations

Showing math.GRShow all

2 papers · 1 filter

math.GR2014

Commutator subgroup of the Hecke group $G_{5}$ is not congruence

Cheng Lien Lang, Mong Lung Lang

We prove that the power subgroup $G_{5}^{5}$ and the commutator subgroup $G_{5}^{'}$ of the Hecke group $G_{5}$ are not congruence.

math.GR2014★ 2 cited

Wohlfahrt's Theorem for the Hecke group G_5

Cheng Lien Lang, Mong Lung Lang

Let K be a subgroup of the inhomogeneous Hecke group G_5 of finite index. Suppose that the geometric level of K is r. Then K is congruence if and only if K contains the principal c…

Commutator subgroup of the Hecke group G5​ is not congruence

Wohlfahrt's Theorem for the Hecke group G_5

Commutator subgroup of the Hecke group $G_{5}$ is not congruence