Dear Stefano,
Thank you for your message. There is a useful Wikipedia article
on the topic of Centralisers and Normalisers at
https://en.wikipedia.org/wiki/Centralizer_and_normalizer
Best wishes,
Gerard
--
On Mon, Mar 24, 2025 at 11:56:13AM +0100, Stefano Trapani wrote:
> Thank you Gerard.
>
> This is exactly what I was looking for: “normalisers”.
>
> Best regards.
>
> Stefano Trapani
>
>
>
> -----Message original-----
> De: Gerard <g...@globalphasing.com>
> à: Stefano <stefano.trap...@umontpellier.fr>
> Cc: CCP4BB <CCP4BB@JISCMAIL.AC.UK>
> Envoyé: lundi 24 mars 2025 11:03 CET
> Sujet : Re: [ccp4bb] symmetry of symmetry (equivalent of "Cheshire
> group" for point groups)
>
>
> Dear Stefano,
>
> I think that in general group theory, this object is called the
> "normaliser" of the group. You could perhaps just use this general
> name, rather than try and dig out another "cute" domain-specific
> terminology ;-) .
>
> With best wishes,
>
> Gerard.
>
> --
> On Mon, Mar 24, 2025 at 10:44:28AM +0100, Stefano Trapani wrote:
> > Hi
> > Does anybody know if there is a conventional name to indicate the symmetry
> > of the set of symmetry elements (axes, planes) of a point group?
> > I know that, for space groups, the symmetry of their symmetry elements is
> > called the "Cheshire symmetry".
> > Is this name used also for point groups?
> >
> > Best regards
> >
> > Stefano Trapani
> >
> > Maître de Conférences
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> >
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> >
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