The origin of imaginary imaginary numbers can be traced back to ancient Greeks. But once they thought that all numbers were reasonable. Over the years mathematicians have not accepted the fact that equations may have solutions smaller than zero. These types of numbers are numbers that we call negative numbers today. Unfortunately, centuries of expressions seem to be unable to be solved because of lack of understanding of negative numbers. Therefore, from the newly discovered negative data, mathematicians found imaginary numbers.
3 But this may not be the truth about the imaginary history. After Pythagoras discovers the asymmetry of the unit square diagonal and its sides, it may be more accurate to describe the introduction of an invalid number. On the other hand, imaginary numbers have a more complex history of use, acceptance and interpretation (as explained by Priest 1998). Nonetheless, the above example is useful for explaining conceptual concepts. 4 In some places, Waismann's view seems to introduce Quine / Duhem's general thesis paper. I think it is perfectly compatible with the view of my concept.
The imaginary number is a number, and squaring results in a negative number. Basically, the imaginary number is the square root of a negative number, and there is no concrete value. This is not a real number, but it can not be quantized with a digit string. Since imaginary numbers exist and are used in mathematics, it is "real number". Usually it is represented by a symbol, and the imaginary number is represented by the symbol j in the electron (because "current" is indicated). Imaginary numbers are particularly suitable for electricity, especially for alternating current (AC) electronics. AC is a sinusoidal wave that changes positive and negative. It may be very difficult to combine AC currents. Because they may not match the wave properly. Using virtual current and real numbers helps to calculate and avoid electric shock using AC.