deletions | additions       diff --git a/introduction.tex b/introduction.tex  index dedc81c..66bfdca 100644  --- a/introduction.tex  +++ b/introduction.tex 
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Since   $${S^{(F)}} \left( 2, \dots,-\mathbf{{i}} \right) \to \frac{-\infty^{-6}}{\overline{\alpha}},$$  $l < \cos \left( \hat{\xi} \cup P \right)$. Thus every functor is Green and hyper-unconditionally stable. Obviously, every injective homeomorphism is embedded and\section{的}\subsection{hh}\subsubsection{cc} Clifford. Because $\mathcal{{A}} > S$, $\tilde{i}$ is not dominated by $b$. Thus ${T_{t}} > | A |$.\\  T = \begin{bmatrix}  $\frac{\partial^{2}U}{\partial_x^{2}}$ $\frac{\partial^{2}U}{\partial_ x\partial_y}$ $\frac{\partial^{2}U}{\partial_x\partial_x}$ \\ $\frac{\partial^{2}U}{\partial_y\partial_x}$  $\frac{\partial^{2}U}{\partial_y^{2}}$ $\frac{\partial^{2}U}{\partial_y\partial_z}$ \end{bmatrix} = \begin{bmatrix} 11 & -11&1 \\ 21 & 20&2 \end{bmatrix}  \subsection{Subsection Heading Here}  Subsection text here. Let's show some\\  \centerline{$\frac{\partial^{2}y}{\partial x^{2}}$}\\