[Haskell-cafe] Category Theory woes
Hans Aberg
haberg at math.su.se
Fri Feb 19 04:42:59 EST 2010
On 19 Feb 2010, at 00:55, Daniel Fischer wrote:
>> I'd always assumed "ring" was generalised from Z[n].
>
> As in "cyclic group", arrange the numbers in a ring like on a
> clockface?
> Maybe. As far as I know, the term "ring" (in the mathematical sense)
> first
> appears in chapter 9 - Die Zahlringe des Körpers - of Hilbert's "Die
> Theorie der algebraischen Zahlkörper". Unfortunately, Hilbert gives
> no hint
> why he chose that name (Dedekind, who coined the term "Körper", called
> these structures "Ordnung" [order]).
The Wikipedia article "Ring" says he used it for a specific one where
the elements somehow cycled back.
Hans
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