---
layout: stdlib-reference
---

# IBackwardDifferentiable\<FType\>\.bwd\_diff

## Description





## Signature 

<pre>
<span class='code_keyword'>static</span> <a href="index.html" class="code_type">IBackwardDifferentiable</a>&lt;<a href="index.html#typeparam-FType" class="code_type">FType</a>&gt;.<a href="bwd_diff.html">bwd_diff</a> : <a href="../../types/bwddifffunctype-037b/index.html" class="code_type">BwdDiffFuncType</a>&lt;<a href="index.html#typeparam-FType" class="code_type">FType</a>&gt;
</pre>