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External Websites

• K12 LibreTexts - Imaginary Numbers
• Academia - Imaginary Number and Geometric Algebra
• Khan Academy - Intro to the imaginary numbers
• Mathematical Association of America - The Reality of the Complex: The Discovery and Development of Imaginary Numbers
• Story of Mathematics - Imaginary Number|Definition & Meaning
• Math is Fun - Imaginary Numbers

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Last Updated: Oct 8, 2024• Article History

Related Topics:

complex number

imaginary number, any product of the form a i, in which a is a real number and i is the imaginary unit defined as Square root of√−1. See numerals and numeral systems.

This article was most recently revised and updated by William L. Hosch.