smm16r

The research of the book's author has redeveloped the imaginary unit and complex number theory from the ground-up based on first principles, without using i = sqrt(-1) or i^2 = -1. This makes it accessible across broader educational levels—including elementary schools.

Even though the book is designed for kids, it is also recommended for curious readers of all ages who want fresh ideas.

The imaginary unit sqrt(-1) and complex numbers can be re-developed from first principles. This has finally revealed imaginary numbers in our daily life after 500 years since their inception. The most important practical implication, particularly for learners, is that the complex number plane is replaceable by the familiar x-y plane, which has a direct connection to the real world.