FeynCalc

A general purpose calculator for Feynman diagrams

Diagram generation

The folder "diagram" contains a python codebase to generate Feynman/Hugenholtz diagrams. The following is a list of important files:

• diagram.py: Basic functions and data structure for generic diagrams
• free_energy.py: A class to handle Free energy diagrams
• polar.py: A class to handle polarization diagrams
• main.py: Control the workflow of the diagram generation

External libraries:

fmtlib: fmt (formerly cppformat) is an open-source formatting library. It can be used as a fast and safe alternative to printf and IOStreams. API reference.