8147 424 1 Imaginary Numbers are Real - Part 1: Introduction 8147 424 1 Math Imaginary Numbers are Real

7319 259 0 Imaginary Numbers are Real - Part 2: A Little History 7319 259 0 Math Imaginary Numbers are Real

7451 144 0 Imaginary Numbers are Real - Part 3: Cardan's Problem 7451 144 0 Math Imaginary Numbers are Real