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Groups whose three-generator subgroups are free
1989
Bulletin of the Australian Mathematical Society
We define a certain class of groups, Cfc, which we show to contain the class of all fc-free groups. Our main theorem shows that certain amalgamated free products of groups in C3 are again in C'3. In the appendix we show that many 3-manifold groups belong to C& for suitable k.
doi:10.1017/s0004972700004275
fatcat:n2rnzryutfbuxocxbumlginloe