diff --git a/preamble-common.tex b/preamble-common.tex
@@ -12,7 +12,7 @@
%
% Pablo (C) 2021
-\usepackage{amsmath, amssymb, amsthm, stmaryrd, mathrsfs, mathabx, dsfont}
+\usepackage{amsmath, amssymb, amsthm, stmaryrd, mathrsfs, gensymb, dsfont}
\usepackage{mathtools, adjustbox}
\usepackage[scr=esstix,cal=boondox]{mathalfa}
\usepackage{enumitem, xfrac, xcolor, cancel, multicol, tabularx, relsize}
@@ -26,6 +26,9 @@
\usepackage[normalem]{ulem}
\usepackage{minted}
+% Set the color scheme used by minted
+\usemintedstyle{friendly}
+
% Configure graphics
\usetikzlibrary{calc, shadows.blur, shapes.geometric, patterns, arrows}
\pgfplotsset{compat=1.16}
@@ -100,6 +103,10 @@
% Set cardinal
\newcommand{\card}[1]{\left|\nobreak#1\nobreak\right|}
+% Minus sign with a dot over it. Usefull for typsetting saturated subtraction
+\def\dotminus{\mathbin{\ooalign{\hss\raise1ex\hbox{.}\hss\cr
+ \mathsurround=0pt$-$}}}
+
% Empty macro (it's usefull for typesetting Young diagrams)
\newcommand{\void}{ }