10 Oct
2009
10 Oct
'09
4:18 p.m.
On Saturday 10 October 2009 21:14:22 Richard Guy wrote:
Didn't bother to answer, since it seemed obvious that this was a sphere with imaginary radius:
(x + 3/2)^2 + (y + 3/2)^2 + (z + 3/2)^2 = -7/4. R.
Ah yes, very nice that you can do it mod oo as well as mod 2. I feel very stupid for even trying the mod 2 way. D'oh! -- g