diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9e4a8bbc..09397671 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 - Added [stfloats](https://ctan.org/pkg/stfloats) package to enable footnotes below floats.
 - Added `ngerman` as class option for German documents.
+- Added macros `\eg` and `\ie`.
+- Added macro `\powerset` to correctly typeset the powerset symbol.
 
 ### Changed
 
diff --git a/config.tex b/config.tex
index ead83a0c..cd65252b 100644
--- a/config.tex
+++ b/config.tex
@@ -211,6 +211,22 @@
 %
 %%%
 
+\newcommand{\eg}{e.\,g.,\ }
+\newcommand{\ie}{i.\,e.,\ }
+
+% EN: introduce \powerset - hint by http://matheplanet.com/matheplanet/nuke/html/viewtopic.php?topic=136492&post_id=997377
+\DeclareFontFamily{U}{MnSymbolC}{}
+\DeclareSymbolFont{MnSyC}{U}{MnSymbolC}{m}{n}
+\DeclareFontShape{U}{MnSymbolC}{m}{n}{
+  <-6>    MnSymbolC5
+  <6-7>   MnSymbolC6
+  <7-8>   MnSymbolC7
+  <8-9>   MnSymbolC8
+  <9-10>  MnSymbolC9
+  <10-12> MnSymbolC10
+  <12->   MnSymbolC12%
+}{}
+\DeclareMathSymbol{\powerset}{\mathord}{MnSyC}{180}
 
 %%%
 % EN: Package for the appendix