9898 424 1 Imaginary Numbers are Real - Part 1: Introduction 9898 424 1 Math Imaginary Numbers are Real
8577 259 0 Imaginary Numbers are Real - Part 2: A Little History 8577 259 0 Math Imaginary Numbers are Real
8929 144 0 Imaginary Numbers are Real - Part 3: Cardan's Problem 8929 144 0 Math Imaginary Numbers are Real
