@inproceedings{8a2d0069afba407b83e928f07a32507c,

title = "A Remark on Finitely Generated Subgroups of Free Groups",

abstract = "It is proven that if H is a finitely generated subgroup of a free group F and the index [F: H] is infinite, then there exists a nontrivial normal subgroup N of F with N∩H = {1}.",

author = "Ivanov, {S. V.} and Schupp, {P. E.}",

year = "2000",

doi = "10.1007/978-1-4612-1388-8_7",

language = "English (US)",

isbn = "978-1-4612-7126-0",

series = "Trends in Mathematics",

publisher = "Birkhauser Boston",

pages = "139--142",

editor = "Jean-Camille Birget and Stuart Margolis and John Meakin and Mark Sapir",

booktitle = "Algorithmic Problems in Groups and Semigroups",

address = "United States",

}