Renormalization

Focusing on the rigorous introduction to perturbative renormalization, this book bridges the gap between physics education and advanced mathematical approaches. It covers essential techniques for understanding both perturbative and nonperturbative renormalization, including a proof of the renormalizability of φ^4 theory in four dimensions. The text is designed for third-year students in mathematics and physics, providing foundational knowledge to engage with contemporary literature on nonperturbative renormalization. Key topics include Gaussian integration and Feynman graph expansions.