Fel’shtyn, A.; Goncalves, D.L.
(Algebra and Discrete Mathematics, 2006)
Let φ : G → G be a group endomorphism where
G is a finitely generated group of exponential growth, and denote
by R(φ) the number of twisted φ-conjugacy classes. Fel’shtyn and
Hill [7] conjectured that if φ is injective, ...