Talk:Point groups in three dimensions

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[edit] Merge

I think it would be a good idea to merge this article into the one on point groups. I don't really see that we need a separate aricle for the 3D case. We also have an article on Crystallographic point groups that deals specifically with point groups in crystallography (which i think is ok). So there's in total 3 articles relating to different cases of point groups, which makes it pretty confusing to anyone not familiar with the subject. O. Prytz 00:00, 6 June 2006 (UTC)

I agree, I think the central article should be at point groups too. --HappyCamper 02:40, 18 August 2006 (UTC)
I do not agree. We have also Point groups in two dimensions. Point group is an introduction for general dimension.--Patrick 08:42, 7 October 2006 (UTC)

[edit] sub/super

How about a table something like this:

immediate subgroups immediate supergroups
Ih 120 I, Th, D5d, D3d
I 60 T, D5, D3 Ih
Oh 48 Td, Th, D4h, D4d, D3d
O 24 T, D4, D3 Oh
Td 24 T, D2d, C3v Oh
Th 24 T, D2h, S6 Oh, Ih
T 12 D2, C3 Td, Th, O, I
Dnh 4n Dn, Cnh Dmnh
Dnd 4n Dn, Cnv, S2n Dmnd

and so on. —Tamfang 01:07, 9 May 2007 (UTC)

Sure, that seems like a reasonable and useful summary of the various relationships among the groups.
Also in that spirit, how about a table of irreducible representations of some common groups for spectroscopic applications, a la F.A. Cotton? Baccyak4H (Yak!) 01:54, 9 May 2007 (UTC)