nLab
imaginary unit

Contents

Definition

The complex numbers +i+i and i-i, i.e. the two solutions xx to the equation x 2=1x^2 = -1, are the imaginary units.

A complex number of the form yiy i with yy \in \mathbb{R} a real number is called a purely imaginary number.

References

Created on January 6, 2018 at 14:28:03. See the history of this page for a list of all contributions to it.