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\title{Minimal distance to a cubic function}
\author{Martin Thoma}

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  pdfauthor   = {Martin Thoma}, 
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  pdftitle    = {} 
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\begin{abstract}
In this paper I want to discuss how to find the minimal distance of a
point $P = (x_p, y_p)$ to a cubic function $f: \mathbb{R} \rightarrow \mathbb{R}$, 
$f(x) = a \cdot x^3 + b \cdot x^2 + c \cdot x + d$.

So I search for $x \in \mathbb{R}$ such that \dots
\end{abstract}

\section{Minimal distance constant function}
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