ag-gipp/GoUldI

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            <mi data-semantic-type="identifier" data-semantic-role="greekletter" data-semantic-font="italic" data-semantic-id="23" data-semantic-parent="28">δ
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    <annotation encoding="application/x-tex">\epsilon _{jk\ell }\epsilon _{\ell mn}=\delta _{j,m}\delta _{k,n}-\delta _{j,n}\delta _{k,m}</annotation>
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</math>