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・ Bounded growth
・ Bounded inverse theorem
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・ Bounded quantification
・ Bounded quantifier
・ Bounded rationality
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・ Bounded set
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Boundedly generated group
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Boundedly generated group : ウィキペディア英語版
Boundedly generated group
In mathematics, a group is called boundedly generated if it can be expressed as a finite product of cyclic subgroups. The property of bounded generation is also closely related with the congruence subgroup problem (see ).
== Definitions ==

A group ''G'' is called ''boundedly generated'' if there exists a finite subset ''S'' of ''G'' and a positive integer ''m'' such that every element ''g'' of ''G'' can be represented as a product of at most ''m'' powers of the elements of ''S'':

: g = s_1^ \cdots s_m^, where s_i \in S and k_i are integers.
The finite set ''S'' generates ''G'', so a boundedly generated group is finitely generated.
An equivalent definition can be given in terms of cyclic subgroups. A group ''G'' is called ''boundedly generated'' if there is a finite family ''C''1, …, ''C''''M'' of not necessarily distinct cyclic subgroups such that ''G'' = ''C''1…''C''''M'' as a set.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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