The number of conjugacy classes of non-normal subgroups is an invariant of a group G denoted by v(G). In this paper explicit upper bounds for the order of the commutator subgroup [G'] and for the index of the centre in G, [G : Z(G)] are given for a group G with only a finite number of non-normal subgroups. The bounds provided are functions of v(G) and the primes appearing as orders of elements of G.
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Guangxi Normal Univ, Sch Math & Stat, Guilin 541004, Guangxi, Peoples R ChinaGuangxi Normal Univ, Sch Math & Stat, Guilin 541004, Guangxi, Peoples R China
Lu, Jiakuan
Pang, Linna
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Guangxi Normal Univ, Sch Math & Stat, Guilin 541004, Guangxi, Peoples R ChinaGuangxi Normal Univ, Sch Math & Stat, Guilin 541004, Guangxi, Peoples R China
Pang, Linna
Qiu, Yanyan
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Guangxi Normal Univ, Sch Math & Stat, Guilin 541004, Guangxi, Peoples R ChinaGuangxi Normal Univ, Sch Math & Stat, Guilin 541004, Guangxi, Peoples R China
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Guangxi Normal Univ, Sch Math & Stat, Guangxi 541004, Guilin, Peoples R ChinaGuangxi Normal Univ, Sch Math & Stat, Guangxi 541004, Guilin, Peoples R China
Lu, Jiakuan
Meng, Wei
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Yunnan Minzu Univ, Sch Math & Comp Sci, Kunming, Yunnan, Peoples R ChinaGuangxi Normal Univ, Sch Math & Stat, Guangxi 541004, Guilin, Peoples R China