10 Jun
2011
10 Jun
'11
1:47 a.m.
="Hans Havermann" <pxp@rogers.com> I'm going to guess that the "positive" Gaussian quadrant illustrated by Conway and Guy can be rotated into the *top-right* quadrant without loss of the unique-factorization principle.
OK, you've convinced me; it's not broken, just different. So with the top-right quadrant the sum-of-divisors of 5 is 9+3i, while with Gauss's quadrant it's 10.