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We characterize the test words of ℤm * ℤn. They are those elements not contained in a proper retract.
1.Imrich, W. and Turner, E. C., Endomorphisms of free groups and their fixed points, Math. Proc. Cambridge Philos. Soc105 (1989), 421–422.CrossRefGoogle Scholar
2
2.Lyndon, R. and Schupp, P., Combinatorial Group Theory (Springer-Verlag, 1970).Google Scholar
3
3.Magnus, W., Karrass, A. and Solitar, D., Combinatorial Group Theory (Wiley, New York, 1966).Google Scholar
4
4.Turner, E. C., Test words for automorphisms of free groups, Bull. London Math. Soc., to appear.Google Scholar