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seen Aug 31 '12 at 13:19

May
10
awarded  Editor
May
10
revised particular subset of integers generating rational numbers
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May
10
comment particular subset of integers generating rational numbers
Duly noted, $\wedge$ is the notation I grew up with for g.c.d., but I changed it in the post. Difference sets look quite interesting, thank you quid.
May
9
answered particular subset of integers generating rational numbers