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\( \DeclarePairedDelimiter{\set}{\{}{\}}\)
\( \DeclarePairedDelimiter{\parens}{\left(}{\right)}\)
\(\DeclarePairedDelimiterX{\innerproduct}[1]{\langle}{\rangle}{#1}\)
\(\newcommand{\ip}[1]{\innerproduct{#1}}\)
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