On Sep 18, 2007, at 12:00 AM, William Stein wrote:

> I also want to make ZZ[a,b,c]
> work, if a,b,c are algebraic integers.

Suppose that b and c are roots of x^3 - 2, but without any embedding  
information given. How do you decide what Q[b, c] means? i.e. how do  
you tell whether b and c are "the same"?

david


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