diff --git a/.gitignore b/.gitignore
index f7f6043..d6fcb13 100644
--- a/.gitignore
+++ b/.gitignore
@@ -22,8 +22,8 @@
 *.xdv
 *-converted-to.*
 # these rules might exclude image files for figures etc.
-main*.ps
-main*.eps
+# *.ps
+# *.eps
 *.pdf
 
 ## Generated if empty string is given at "Please type another file name for output:"
diff --git a/main.tex b/main.tex
index 7922f38..f2ebbef 100644
--- a/main.tex
+++ b/main.tex
@@ -145,41 +145,14 @@
 \end{center}
 
 \section{Equations}
-\subsection{Fundamental equations}
-\subsubsection{Navier-Stokes}
+\subsection{Navier-Stokes}
 \begin{equation}
-    \frac{Du}{Dt} = \underbrace{-\frac{1}{\rho}\nabla p}_\mathrm{Pressure} - \underbrace{(2\Omega \times u)}_\mathrm{Coriolis} - \underbrace{g'K}_\mathrm{Gravity} + \underbrace{F^{**}}_\mathrm{Viscous}
-\end{equation}
-
-\subsubsection{Conservation of mass}
-\begin{equation}
-    \frac{D \rho}{Dt} + \rho(\nabla u) = 0 
-\end{equation}
-
-\subsubsection{First law of thermodynamics}
-\begin{equation}
-    \frac{D\theta}{Dt} = \bigg(\frac{\theta}{c_p T} \bigg) \mathcal{H}
-\end{equation}
-if $\mathcal{H} = 0$, the process is \textit{adiabatic}
-
-\subsubsection{Equation of state}
-\begin{equation}
-    p = \rho RT
+    \frac{D}{Dt}
 \end{equation}
 
 \subsection{Circulation}
 \begin{equation}
-    C = \oint_c \vec{v} \, dc = \oint (u \, dx + v \, dy + w \, dz) = \oint_0^{2\pi} \vec{v} \, r \, d\phi
-\end{equation}
-
-\subsection{Quasi geostrophic system of equations}
-\begin{equation}
-    \zeta = \frac{\partial v}{\partial x} - \frac{\partial u}{\partial y}
-\end{equation}
-
-\subsubsection*{Vorticity equation}
-\begin{equation}
-    \frac{D_h}{Dt} \zeta + \beta v = -f_0(\nabla_h \vec{v})
+    C = \oint_c u \, dc = \oint (u \, dx + v \, dy + w \, dz)
 \end{equation}
 
 \section{Concepts}
@@ -189,20 +162,6 @@ if $\mathcal{H} = 0$, the process is \textit{adiabatic}
     \frac{\partial}{\partial z} v_G = \bigg(\frac{1}{f}\frac{g}{\theta_0}\bigg)(k \times \nabla_h \theta^*)
 \end{equation}
 
-\subsection{$Q$-Vector}
-The $Q$-Vector indicates if there is cyclogenesis ($\mathcal{F} < 0$, $\mathcal{F} \sim \nabla_h Q$)
-\vspace{2mm} \\
-How to determine the $Q$-Vector on weather charts:
-\begin{enumerate}
-    \item Locate regions with:
-    \begin{itemize}
-        \item Large temperature gradient
-        \item Strong wind change
-    \end{itemize}
-    \item Determine wind-change vector
-    \item Rotate that vector by $+90^\circ$
-\end{enumerate}
-
 \scriptsize
 
 \section*{Copyleft}