deletions | additions       diff --git a/untitled.tex b/untitled.tex  index ece2fce..dc4d890 100644  --- a/untitled.tex  +++ b/untitled.tex 
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\usepackage{amsmath}  \usepackage{biblatex}  \usepackage{mathtools}  \begin{document}  \section{Overview}  This document presents a parametric model to help design an Interferometric Array. It describes the relationship of design parameters in section 2 with performance objectives in section 3.  
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\subsection{Engineering cost vs. Calibration cost}  Tricky because you can compensate antenna quality with software. So the equations must capture this trade off.  \end{document}