A Primer on Functional Methods and the Schwinger-Dyson Equations
High Energy Physics - Phenomenology
2025-12-05 v3
Abstract
An elementary introduction to functional methods and the Schwinger-Dyson equations is presented. Emphasis is placed on practical topics not normally covered in textbooks, such as a diagrammatic method for generating equations at high order, different forms of Schwinger-Dyson equations, renormalisation, and methods for solving Schwinger-Dyson equations.
Keywords
Cite
@article{arxiv.1008.4337,
title = {A Primer on Functional Methods and the Schwinger-Dyson Equations},
author = {Eric S. Swanson},
journal= {arXiv preprint arXiv:1008.4337},
year = {2025}
}
Comments
38 pages, 15 figures. Lectures presented at Hadron XI, Maresias, Brazil and HUGS, Jefferson Lab. v2: tex formatting issues fixed, references added. v3 typos corrected