Geodesic
Counterexamples to Two Problems on One-Relator Groups
Canadian mathematical bulletin, Tome 19 (1976) no. 3, pp. 363-364

Voir la notice de l'article provenant de la source Cambridge University Press

In [2] G. Baumslag presents a list of twenty-three unsolved problems on one-relator groups. We give counterexamples to two of them.Problem 5 asks whether a maximal locally free subgroup of a one-relator group always has finite “rank” (G has “rank” k if each finitely generated subgroup of G is contained in a k-generator subgroup of G). 
Fischer, J. Counterexamples to Two Problems on One-Relator Groups. Canadian mathematical bulletin, Tome 19 (1976) no. 3, pp. 363-364. doi: 10.4153/CMB-1976-055-2
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