Talk:Infinite dihedral group
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[edit]The following Wikimedia Commons file used on this page has been nominated for deletion:
Participate in the deletion discussion at the nomination page. —Community Tech bot (talk) 20:21, 7 February 2019 (UTC)
Mistake?
[edit]In the first sentence of the 'Definition' section, the article says: "Every dihedral group is generated by a rotation r and a reflection; if the rotation is a rational multiple of a full rotation, then there is some integer n such that rn is the identity, and we have a finite dihedral group of order 2n." Should it not say "there is some *least* integer n"?
This is barely a stub and should be much improved
[edit]This article says so little about its suubject, the infinite dihedral group, that it doesn't even mention a concrete realization of the generators given in its presentation as isometries of the integers.
At the very least, the article should mention these.
And such concrete realizations and other group-theoretical aspects of this group — all omitted from the article so far — are much more relevant than the long section about aliasing — which belongs in the aliasing article, not here.
I hope someone knowledgable about this group will improve this article by adding some of the omitted information.