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layout: stdlib-reference
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# IDifferentiableArithmetic\.sub

## 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="sub.html">sub</a>(<a href="index.html" class="code_type">IDifferentiableArithmetic</a>.<span class="code_keyword">This</span> <a href="sub.html#decl-other" class="code_param">other</a>);

</pre>

## Parameters

####  <a id="decl-other"></a>other  : [IDifferentiableArithmetic](index.html)\.This