caa a22 4500 386360065 CHVBK 20180307111912.0 cr unu---uuuuu 161130e198910 xx s 000 0 eng 10.1017/S0004972700004275 doi S0004972700004275 pii (NATIONALLICENCE)cambridge-10.1017/S0004972700004275 Groups whose three-generator subgroups are free [Elektronische Daten] We define a certain class of groups, Ck, which we show to contain the class of all k-free groups. Our main theorem shows that certain amalgamated free products of groups in C3, are again in C3. In the appendix we show that many 3-manifold groups belong to Ck for suitable k. Copyright © Australian Mathematical Society 1989 Baumslag Gilbert Department of Mathematics, City College (CUNY), New York, NY 10031, United States of America Shalen Peter B. Department of Mathematics, Statistics and Computer Science, The University of Illinois at Chicago, Chicago, IL 60680 United States of America Bulletin of the Australian Mathematical Society Cambridge University Press 40/2(1989-10), 163-174 0004-9727 40:2<163 1989 40 BAZ https://doi.org/10.1017/S0004972700004275 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0004972700004275 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Baumslag Gilbert Department of Mathematics, City College (CUNY), New York, NY 10031, United States of America NATIONALLICENCE 700 1- Shalen Peter B. Department of Mathematics, Statistics and Computer Science, The University of Illinois at Chicago, Chicago, IL 60680 United States of America NATIONALLICENCE 773 0- Bulletin of the Australian Mathematical Society Cambridge University Press 40/2(1989-10), 163-174 0004-9727 40:2<163 1989 40 BAZ CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge