2 papers
math.GR2026
Quasi-convex surface subgroups in some one-relator groups with torsion
Andrew Ng
We find surface subgroups in certain one-relator groups with torsion and use this to deduce a profinite criterion for a word in the free group to be primitive.
math.GR2025
Virtual First Betti Number of GGS Groups
Andrew Ng
We observe a criterion for groups to have vanishing virtual first Betti number and use it to give infinitely many examples of torsion-free, finitely generated, residually finite gr…