Saya mau tau Fungsi Signum kompleks dari Nombor negatif dan nombor bukan negatif. Jelaskan dalam bahasa melayu

It is possible to define a function csgn(x) on the complex numbers which is 1 for positive numbers, −1 for negative numbers and 0 for zero (sometimes called the complex signum function):

Where the complex inequality should be interpreted as follows

We then have (except for x=0):