9975 424 1 Imaginary Numbers are Real - Part 1: Introduction 9975 424 1 Math Imaginary Numbers are Real
8623 259 0 Imaginary Numbers are Real - Part 2: A Little History 8623 259 0 Math Imaginary Numbers are Real
9010 144 0 Imaginary Numbers are Real - Part 3: Cardan's Problem 9010 144 0 Math Imaginary Numbers are Real
