Nilpotency class: Difference between revisions
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===Symbol-free definition=== | ===Symbol-free definition=== | ||
For a [[nilpotent group]], the '''nilpotence class''' is defined in any of the following equivalent ways: | For a [[nilpotent group]], the '''nilpotency class''' or '''nilpotence class''' is defined in any of the following equivalent ways: | ||
* It is the length of the [[upper central series]] | * It is the length of the [[upper central series]] | ||
Revision as of 15:23, 26 March 2008
This article defines an arithmetic function on a restricted class of groups, namely: nilpotent groups
Definition
Symbol-free definition
For a nilpotent group, the nilpotency class or nilpotence class is defined in any of the following equivalent ways:
- It is the length of the upper central series
- It is the length of the lower central series
- It is the length of any central series
A group is said to be of class if its nilpotence class is less than or equal to .