My intention is to make this book freely available to everyone. If you wish to support this work, you can do so by donating to help children and people affected by disasters in war-torn countries through the International Committee of the Red Cross (ICRC). For details, see Supporting this work.

Writing this book was inspired by my first book (Machine Learning for Quantum Chemistry), which has benefited many readers. This book explains the theory of various methods in quantum chemistry, including algorithms for programming calculations to study the quantum properties of molecular systems.

I hope this book will be of some benefit to students, teachers, researchers, and anyone interested in this field. I compiled the contents based on my own understanding; if you find any mistakes or have any suggestions, please feel free to let me know :) Happy reading!

Last updated: February 6, 2024