2 Jul
2003
2 Jul
'03
10:09 a.m.
Marc LeBrun wrote:
Regarding Z*(SqrtD) = {x + y SqrtD; integer x, y, D>=0}... 2. What's best to call the whole algebraic structure?
I'd say Z*(SqrtD) = {x + y SqrtD; integer x, y>=0}, for integer D>=0, just to keep the scope straight. I take it "Z*" is the nonnegative integers. Henry Baker <hbaker1@pipeline.com> wrote:
"algebraic natural numbers" or "natural algebraic numbers" ??
Cute name, but I'd rather use that for the positive elements of Z(SqrtD) (or the nonnegative ones, in France and set theory). Then the elements of Z(SqrtD) with both components positive could be called "supernatural", and those with at least one component positive could be called "subnatural". Dan Hoey@AIC.NRL.Navy.Mil