Stabilizer

From Online Dictionary of Crystallography

(Difference between revisions)
Jump to: navigation, search
m (Style edits to align with printed edition)
m (Not necessarily "sub" (部分))
 
(2 intermediate revisions not shown)
Line 1: Line 1:
-
<font color="blue">Stabilisateur</font> (''Fr''). <font color="red">Stabilisator</font> (''Ge''). <font color="black">Stabilizzatore</font> (''It''). <font color="purple">安定部分群</font> (''Ja'').
+
<font color="blue">Stabilisateur</font> (''Fr''). <font color="red">Stabilisator</font> (''Ge''). <font color="black">Stabilizzatore</font> (''It''). <font color="purple">安定群</font> (''Ja''). <font color="brown">Стабилизатор</font> (''Ru''). <font color="green">Estabilizador</font> (''Sp'').
 +
 
 +
 
 +
Synonym: isotropy group.

Latest revision as of 16:06, 28 November 2018

Stabilisateur (Fr). Stabilisator (Ge). Stabilizzatore (It). 安定群 (Ja). Стабилизатор (Ru). Estabilizador (Sp).


Synonym: isotropy group.


Let G be a group which acts on a set A by a composition law *, and let a be a given element of A. Then the set

Ga = {gG | a*g = a}

is called the stabilizer of A. Ga is the set of all elements of G which leave a unchanged or 'stable'. Ga is a subgroup of G.


Example

The site-symmetry group of a Wyckoff position is the stabilizer of that position. In this example, G is the space group, the stabilizer is the site-symmetry group, the set A is the set of triples of x,y,z coordinates (set of points in the three-dimensional space), the element a that is 'stable' under the action of the stabilizer is the Wyckoff position which corresponds to that site-symmetry group.

See also