Let R be an ordered Ring. Assume R+ is well-ordered
a) min(R+) = 1.
b) R is an integer ring
Sounds like a homework problem all right.
You didn't say it, but I assume you're looking for help? What have you done (successful or not), and where are you stuck?
(1) Why does min(R+) exist?
(2) Let u = min(R+), assume it is not 1, try to get a contradiction.
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