diff --git a/tex/header/preamble.tex b/tex/header/preamble.tex
index 90f7d127cef8cd2472fb11727c0cd1a32482613b..ad791b89ab41cc728fc89d567f9f61d579b5d5b6 100644
--- a/tex/header/preamble.tex
+++ b/tex/header/preamble.tex
@@ -38,7 +38,8 @@
   pdfencoding=auto
 }
 % Abkürzunngen
-
+\newcommand{\Rey}{\operatorname{Re}_d}
+\newcommand{\Nus}{\operatorname{Nu}_d}
 % weitere Befehle
 
 % Typografisches