Lukong Cornelius Fai is professor of theoretical physics at the Department of Physics, Faculty of Sciences, University of Dschang. He is Head of Condensed Matter and Nanomaterials as well as Mesoscopic and Multilayer Structures Laboratory. He was formerly a senior associate at the Abdus Salam International Centre for Theoretical Physics (ICTP), Italy. He holds a Masters of Science in Physics and Mathematics (June 1991) as well as a Doctor of Science in Physics and Mathematics (February 1997) from Moldova State University. He is an author of over a hundred and seventy scientific publications and five textbooks

Chapter 1. Quantum Mechanics Basic Concepts.

Chapter 2. Schrödinger Equation.

Chapter 3. Momentum Operator. Chapter 4. Total Angular Momentum.

Chapter 5. One-Dimensional Motion General Principles.

Chapter 6. Schrödinger Equation.

Chapter 7. Representation Theory.

Chapter 8. Quantum Mechanics Approximate Methods.

Chapter 9. Many-Particle System.

Chapter 10. Approximate Method for the Helium Atom.

Chapter 11. Approximate Method for the Hydrogen Molecule.

Chapter 12. Scattering Theory.

Chapter 13. Polaron Theory.

Chapter 14. Case of an Electron.

Chapter 15. Klein-Gordon Equation.

Chapter 16. Dirac Equation.

Chapter 17. Probability and Current Densities.

Chapter 18. Electron Spin in the Dirac Theory.

Chapter 19. Free Electron State with Defined Momentum-Positronium Motion.

Chapter 20. Dirac Equation.

Chapter 21. Motion in a Magnetic Field.

Chapter 22. Gamma Functions.

Chapter 23. Confluent Hypergeometric Functions.

Chapter 24. Cylindrical Functions.

Chapter 25. Orthogonal Polynomials