On Mon, 24 Sep 2007, Terry Carroll write: >My math is rusty. Is there a concept of "greater than" >or "largest" in complex numbers on different axis? Which >is larger, 4+2i or 2+4i? In fact, complex numbers can not compare directly. People always compare complex numbers with their 'model'. For example, sqrt(a**2 + b**2) is the 'model' of a+bi.