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layout: stdlib-reference
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# IDifferentiableArithmetic\.neg

## Description





## Signature 

<pre>
<a href="index.html" class="code_type">IDifferentiableArithmetic</a>.<span class="code_keyword">This</span> <a href="index.html" class="code_type">IDifferentiableArithmetic</a>.<a href="neg.html">neg</a>();

</pre>