Talk:Automorphism

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 Field: Foundations, logic, and set theory

(I am not satisfied with that, it is too much jargon, there should be an

Untitled[edit]

example, it does not convey the power of the concept and is just a definition) -- Olivier.


Not only that, but what the heck is it?!?! Seriously, I think good encyclopedia articles should assume that the reader may not know the context of the article. A single introductory sentence describing the context can make all the difference in the world. -- Alan Millar


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I added the links that made sense. Edward 07:52, 22 Dec 2004 (UTC)

Centerless?[edit]

It talks of "if G is centerless" in the examples, but isn't G a group, and so contains the identity, which is commutative by definition, and hence all centers contain the identity? so doesn't this put the talk of a centerless group as impossible? -- Moxmalin

By definition, a group is centerless if its center consists of only the identity. See center of a group. -- Fropuff 00:16, 9 February 2007 (UTC)

Automorphisms of R[edit]

Currently the article states that R has no non-trivial order-preserving field-automorphisms, which is true, but potentially misleading since in fact R has no non-trivial field-automorphisms at all (since the order can be recovered from the field operations, as the positive elements are precisely the nonzero squares). I'm changing it. Algebraist 17:15, 22 March 2008 (UTC)