## complex number

How to take the square root of a complex number — and discover a beautiful new surface in the process.

There are a million things in maths named after Leonard Euler. Here's a beautiful formula involving complex numbers.

Have you ever wondered what complex numbers are good for, both within and outside of maths? Find out with this collection of articles and videos.

How Heron of Alexandria missed his chance to explore the unknown mathematical land of complex numbers.

This article gives a short but thorough introduction to that fabled beast of mathematics: the Mandelbrot set.

In this video the structural engineer Ahmer Wadee explains how complex numbers can keep buildings from collapsing.

Got your popcorn? Picked a good seat? Are you sitting comfortably? Then let the credits roll...

In this video the mathematician Holly Krieger explains how complex numbers are important in the study of dynamical systems.

In this video mathematician Chris Budd explains why complex numbers are essential in keeping the lights on.