code: function() {
  
        // 1 / 0 = Infinity and 1 / Infinity = 0
        if (this['isZero']()) {
          return Complex['INFINITY'];
        }
  
        if (this['isInfinite']()) {
          return Complex['ZERO'];
        }
  
        var a = this['re'];
        var b = this['im'];
  
        var d = a * a + b * b;
  
        return new Complex(a / d, -b / d);
      }
docs: Calculate the complex inverse 1/z
  
  @returns {Complex}