21 citations · 46 across the 23 of their papers we have counts for
Showing 2001Show all
2 papers · 1 filter
math.GR2001
Primitivity preserving endomorphisms of free groups
Donghi Lee
An endomorphism of a free group is called primitivity preserving if it takes every primitive element to another primitive. In this paper we prove that every primitivity preserving…
math.GR2001★ 1 cited
On certain C-test words for free groups
Donghi Lee
Let F_m be a free group of a finite rank m > 1 and X_i, Y_j be elements in F_m. A non-empty word w(x_1,..., x_n) is called a C-test word in n letters for F_m if, whenever w(X_1,...…