add shortcuts for opposite categories and abelianization
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@ -178,3 +178,10 @@ __END_OPTIONS_X__
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\def\norm{\@ifstar{\oldnorm}{\oldnorm*}}
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\def\norm{\@ifstar{\oldnorm}{\oldnorm*}}
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\DeclareMathOperator{\amalgprod}{\star}
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\DeclareMathOperator{\amalgprod}{\star}
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\newcommand\op{\text{op}}
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\newcommand\opposite{^{\op}}
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\newcommand\ab{\text{ab}}
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\newcommand\abelianization{^{\ab}}
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