Update Dots

org/notes.org

@@ -8,6 +8,7 @@
 #+LATEX_HEADER: \usepackage{amsthm}
 #+LATEX_HEADER: \usepackage{amssymb}
 #+LATEX_HEADER: \usepackage{amsmath}
+#+LATEX_HEADER: \usepackage{amsfonts}
 #+LATEX_HEADER: \usepackage[utf8]{inputenc}
 #+LATEX_HEADER: \usepackage[T1]{fontenc}
 #+LATEX_HEADER: \usepackage[ngerman]{babel}