code: function(pos) {
          var x = this.x, y = this.y;
          var sq = pos.squaredNorm();
          this.x = x * pos.x + y * pos.y; this.y = y * pos.x - x * pos.y;
          return this.$scale(1 / sq);
      }
docs: /*
  Method: $div
  
  Returns the division of two <Complex> numbers.
  
  Alters the original object.
  
  Parameters:
  
  pos - A <Complex> number.
  
  Returns:
  
  The result of scaling this complex to a factor.