منابع مشابه
Surface Subgroups of Graph Groups
Given a graph T , define the group Fr to be that generated by the vertices of T, with a defining relation xy — yx for each pair x, y of adjacent vertices of T. In this article, we examine the groups Fr, where the graph T is an H-gon, (n > 4). We use a covering space argument to prove that in this case, the commutator subgroup Ff contains the fundamental group of the orientable surface of genus ...
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متن کاملCLASSIFYING FUZZY SUBGROUPS OF FINITE NONABELIAN GROUPS
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ژورنال
عنوان ژورنال: Journal of Algebra
سال: 1987
ISSN: 0021-8693
DOI: 10.1016/0021-8693(87)90063-9