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% packages.tex -- packages required by the paper ellfilter
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% (c) 2019 Prof Dr Andreas Müller, Hochschule Rapperswil
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% if your paper needs special packages, add package commands as in the
% following example
%\usepackage{packagename}


\DeclareMathOperator{\sn}{\text{sn}}
\DeclareMathOperator{\cd}{\text{cd}}