{ "id": "1612.01426", "version": "v1", "published": "2016-12-05T16:43:14.000Z", "updated": "2016-12-05T16:43:14.000Z", "title": "Groups with finiteness conditions on the lower central series of non-normal subgroups", "authors": [ "Fausto De Mari" ], "categories": [ "math.GR" ], "abstract": "It has been proved in [Arch. Math. (Basel) 86 (2006), p. 310-316] that any locally graded group with finitely many derived subgroups of non-normal subgroups has finite derived subgroup. This result is generalized here, in fact we prove that in a locally graded group $G$ the subgroup $\\gamma_{k}(G)$ is finite when the set $\\{\\gamma_{k}(H)~|~H \\ntriangleleft G \\}$ is finite. Moreover, locally graded groups $G$ for which the set $\\{\\gamma_{k}(H)~|~H\\ntriangleleft G,~H~$infinite$\\}$ is finite are also completely described.", "revisions": [ { "version": "v1", "updated": "2016-12-05T16:43:14.000Z" } ], "analyses": { "subjects": [ "20F14", "20F19" ], "keywords": [ "lower central series", "non-normal subgroups", "finiteness conditions", "locally graded group", "finite derived subgroup" ], "note": { "typesetting": "TeX", "pages": 0, "language": "en", "license": "arXiv", "status": "editable" } } }