Mathematician Adrien Douady explains complex numbers. The square root of negative numbers is explained in simple terms. Transforming the plane, deforming pictures, creating fractal images.
To subscribe your Apple's iPhone or ITunes
to the feed click on the right!
To subscribe your Zune go to
The videos are now also enable for iPhone,iPod and iPad so you will be able to enjoy them directly from this site in any of these devices.