#### Volume 6, issue 1 (2002)

On the cut number of a $3$–manifold
 1 T D Cochran, P Melvin, Quantum cyclotomic orders of 3–manifolds, Topology 40 (2001) 95 MR1791269 2 P Gilmer, T Kerler, Cut numbers of 3–manifolds via quantum orders in $\mathbb{Z}[\zeta_5]$, preprint 3 J Howie, Free subgroups in groups of small deficiency, J. Group Theory 1 (1998) 95 MR1490160 4 A Kawauchi, A survey of knot theory, Birkhäuser Verlag (1996) MR1417494 5 T Kerler, Homology TQFT's and the Alexander–Reidemeister invariant of 3–manifolds via Hopf algebras and skein theory, Canad. J. Math. 55 (2003) 766 MR1994073 6 C J Leininger, A W Reid, The co-rank conjecture for 3–manifold groups, Algebr. Geom. Topol. 2 (2002) 37 MR1885215 7 D Ruberman, Seifert surfaces of knots in $S^4$, Pacific J. Math. 145 (1990) 97 MR1066400 8 A S Sikora, Cut numbers of 3–manifolds, Trans. Amer. Math. Soc. 357 (2005) 2007 MR2115088 9 J Stallings, Homology and central series of groups, J. Algebra 2 (1965) 170 MR0175956 10 W P Thurston, A norm for the homology of 3–manifolds, Mem. Amer. Math. Soc. 59 (1986) MR823443