docs: Add reference to contract external fields

2024-12-02 11:56:42 +00:00 · 2024-12-02 11:56:42 +00:00 · be6ee642d1
commit be6ee642d1
parent fd1f47e6fe
1 changed files with 5 additions and 0 deletions
--- a/HepLean/FeynmanDiagrams/Wick/PositionSpace.lean
+++ b/HepLean/FeynmanDiagrams/Wick/PositionSpace.lean
@ -12,6 +12,11 @@ import HepLean.Meta.Informal
 Every complete Wick contraction leads to a function on positions, following
 the Feynman rules.

+## Further reading
+
+The following reference provides a good resource for Wick contractions of external fields.
+- http://www.dylanjtemples.com:82/solutions/QFT_Solution_I-6.pdf
+
 -/

 namespace Wick