Textbook Solutions & Derivations

I am sharing here some derivations and problem solutions that I find interesting or that were very challenging for me. The goal is to help people. However, the best way for you to benefit from this is to attempt these derivations/problems yourself for as long as possible before you check my answers. PLEASE do not use this material as means to copy homework solutions; this is not what they are intended for!

Jackson; Classical Electrodynamics 3rd Ed.

Coleman; Introduction to Many-Body Physics

Peskin & Schroeder; An Introduction to Quantum Field Theory

Goldstein; Classical Mechanics 3rd Ed.