This equation shows the definition of the most fundamental imaginary number, \( \htmlClass{sdt-0000000129}{j} \).
| \( j \) | This symbol represents the imaginary unit, which is defined as the square root of \(-1\). \( j = \sqrt{-1}\). It is the most fundamental unit in the field of complex numbers, allowing for the expression of numbers that cannot be represented on the real number line. |
This is by definition.