Some theorems on the free groups of certain product varieties
Tài liệu tham khảo
Schreier, 1928, Die Untergruppen der freien Gruppen, Abh. Math. Sem. Univ. Hamburg, 5, 161, 10.1007/BF02952517
Baumslag, 1963, Wreath Products and Extensions, Math. Z., 84, 286, 10.1007/BF01111576
Howson, 1954, On the Intersection of Finitely Generated Free Groups, J. London Math. Soc., 29, 428, 10.1112/jlms/s1-29.4.428
Hanna Neumann, Varieties of Groups, J. London Math. Soc.
B. Baumslag, Residually Free Groups, J. London Math. Soc.
Baumslag, 1964, On Varieties Generated by a Finitely Generated Group, Math. Z., 86, 93, 10.1007/BF01111331
L. G. Kovacs and M. F. Newman, unpublished.
Neumann, 1965, On Word Subgroups of Free Groups, Arch. Math., 16, 6, 10.1007/BF01219994
I. Kaplansky, Infinite Abelian Groups, University of Michigan, Ann Arbor, 19XX.
Hall, 1954, Finiteness Conditions for Soluble Groups, 4, 419
Magnus, 1939, On a Theorem of Marshall Hall, Ann. Math., 40, 738, 10.2307/1968892
Kurosh, 1955, The Theory of Groups, Vol. 2
Karrass, 1957, Note on a Theorem of Schreier, 8, 696
Greenberg, 1960, Discrete Groups of Motions, Canad. J. Math., 12, 415, 10.4153/CJM-1960-036-8
Griffiths, 1963, The Fundamental Groups of a Surface, Acta Math., 110, 1, 10.1007/BF02391853
B. Baumslag, Generalized Free Products Whose Two-Generator Subgroups Are Free, Proc. London Math. Soc.,
