Actions

Difference between revisions of "Subgroup"

From Online Dictionary of Crystallography

(See also)
Line 9: Line 9:
  
 
==See also==
 
==See also==
* [[Coset]]
+
*[[Complex]]
 +
*[[Coset]]
 
*[[Normal subgroup]]
 
*[[Normal subgroup]]
 
*Section 8.3.3 in the ''International Tables for Crystallography, Volume A''
 
*Section 8.3.3 in the ''International Tables for Crystallography, Volume A''
  
 
[[Category:Fundamental crystallography]]
 
[[Category:Fundamental crystallography]]

Revision as of 17:56, 25 April 2007

Sous-groupe (Fr); Untergruppe (Ge); Subgrupo (Sp); Sottogruppo (It); 部分群 (Ja).


Let G be a group and H a non-empty subset of G. Then H is called a subgroup of H if the elements of H obey the group postulates.

The subgroup H is called a proper subgroup of G if there are elements of G not contained in H.

A subgroup H of G is called a maximal subgroup of G if there is no proper subgroup M of G such that H is a proper subgroup of M.

See also