hopefully fixed everything, added .out files to gitignore

.gitignore

@@ -4,3 +4,4 @@
 *.toc
 *.synctex.*
 *.fls
+*.out

ana3.tex

@@ -1,6 +1,8 @@
 \documentclass{lecture}
 
 \begin{document}
+\newcommand{\K}{\mathrm{K}}
+\newcommand{\qnorm}[1]{\left\Vert#1\right\Vert^2}
 \section{Fourier-Entwicklung}
 \begin{definition}[Periodische Funktionen]
     $f: \R \to \K$ heißt $L$-periodisch $(L >0)$ falls $f(x+L) = f(x)$, $\forall x \in \R (\implies f(x+kL) = f(x),\; \forall k\in \Z)$.

lecture.cls

@@ -139,7 +139,5 @@
 % remove page before chapters
 \let\cleardoublepage=\clearpage
 
-%josuas fault, ana3.tex addons
-\newcommand{\K}{\mathrm{K}}
-\newcommand{\qnorm}[1]{\left|\left|#1\right|\right|^2}
-\newcommand{\norm}[1]{\left|\left|#1\right|\right|}
+%josua
+\newcommand{\norm}[1]{\left\Vert#1\right|\Vert}