diff --git a/development/FORMAT b/development/FORMAT
index b662714efe..19ed96d3d1 100644
--- a/development/FORMAT
+++ b/development/FORMAT
@@ -7,6 +7,10 @@ The good example would be 2010-01-10 entry.
 
 -----------------------
 
+2010-09-19 Ronen Abravanel <ronena@gmail.com>
+	* Format incremented to 401: support for Feynman diagrams
+	  new math command \Diagram
+
 2010-09-07 Uwe Stöhr <uwestoehr@web.de>
 	* Format incremented to 400: support for the LaTeX-command
 	  \rule;
diff --git a/lib/chkconfig.ltx b/lib/chkconfig.ltx
index 3920d9745a..9e69f9a0de 100644
--- a/lib/chkconfig.ltx
+++ b/lib/chkconfig.ltx
@@ -329,6 +329,7 @@
 \TestPackage{ccfonts}
 \TestPackage{cmbright}
 \TestPackage{eco}
+\TestPackage{feyn}
 \TestPackage{fourier}
 \TestPackage{lmodern}
 \TestPackage{luximono}
diff --git a/lib/doc/LaTeXConfig.lyx b/lib/doc/LaTeXConfig.lyx
index c897f667b9..d797625d55 100644
--- a/lib/doc/LaTeXConfig.lyx
+++ b/lib/doc/LaTeXConfig.lyx
@@ -409,6 +409,44 @@ Computer Modern
  
 \end_layout
 
+\begin_layout Subsection
+feyn
+\end_layout
+
+\begin_layout Description
+Found: 
+\begin_inset Info
+type  "package"
+arg   "feyn"
+\end_inset
+
+
+\end_layout
+
+\begin_layout Description
+CTAN: 
+\family sans
+fonts/feyn/
+\end_layout
+
+\begin_layout Description
+Notes: The package 
+\family sans
+feyn
+\family default
+ is used when you use 
+\family sans
+Feynman
+\family default
+ diagrams in formulas (LaTeX-command 
+\series bold
+
+\backslash
+Diagram
+\series default
+).
+\end_layout
+
 \begin_layout Subsection
 fourier-GUTenberg
 \end_layout