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%-------------------- This is based on the article class ----------------

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\PassOptionsToClass{a4paper}{article}

\LoadClass{article}

\RequirePackage{theorem,graphicx,amssymb,amsmath,fancyhdr}

%------------------ Defining the most common environments ---------------

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\newtheorem{cor}[theorem]{Corollary}
\newtheorem{prop}[theorem]{Proposition}
\newtheorem{invar}{Invariant}
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\newtheorem{conj}{Conjecture}
\newtheorem{defini}{Definition}

\def\QED{\ensuremath{{\square}}}
\def\markatright#1{\leavevmode\unskip\nobreak\quad\hspace*{\fill}{#1}}
\newenvironment{proof}
 {\begin{trivlist}\item[\hskip\labelsep{\bf Proof.}]}
 {\markatright{\QED}\end{trivlist}}

%------------------------------------------------------------------------

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\date{}

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%--------------------------- Headers and Footers ------------------------

\fancypagestyle{plain}{
\fancyhead[RO]{\sf EuroCG 2012, Assisi, Italy, March 19--21, 2012}
\fancyhead[LE]{\sf 28th European Workshop on Computational Geometry, 2012}
\fancyfoot[L]{\sf \scriptsize{This is an extended abstract of a presentation given at EuroCG 2012. It has been made public for the benefit of the community and should be considered a preprint rather than a formally reviewed paper. Thus, this work is expected to appear in a conference with formal proceedings and/or in a journal.}}}



\pagestyle{fancy}
\fancyhead{}
\fancyfoot{}
\fancyhead[RO]{\sf EuroCG 2012, Assisi, Italy, March 19--21, 2012}
\fancyhead[LE]{\sf 28th European Workshop on Computational Geometry, 2012}


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\endinput