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Jul 13, 2010 at 22:14 comment added Pete L. Clark +1: this certainly answers the question. I found it somewhat unsatisfying though that -- so far as I could see -- Nagata's 1978 example of a Euclidean domain with a transfinite algorithm but no $\mathbb{Z}^+$-valued algorithm is listed in the bibliography but not discussed (or even cited!) in the text at all. Instead they give the example of $\mathbb{Z} \oplus \mathbb{Z}$, which is not a domain, so seems rather cheap. According to MathSciNet, before Nagata, Hiblot gave a similar example (first incorrectly, but corrected before Nagata's paper).
Jul 13, 2010 at 19:02 vote accept Yiftach Barnea
Jul 13, 2010 at 14:09 history edited Bill Dubuque CC BY-SA 2.5
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Jul 13, 2010 at 14:03 history answered Bill Dubuque CC BY-SA 2.5