From: Peter.V<anroose@es...>  20011109 12:16:57

> how is the angle between two complex vectors defined? > Is it acos( a.b / ab ) ? No, it is just acos( a.b / ab ), which is in general a complex number. This does not really make sense, i.e., there is no natural interpretation of this kind of angles, but it is the only sensible extension of "real" angles. acos( a.b / ab ) cannot be correct since then the angle between (1,0) and (1,1) would be 45 degrees instead of 135 degrees. Peter. 