class="symbol"><span class="name" title="gt4s: $times$times$colon">**:</span><span class="params">(<span name="that">that: ((<span name="provingground.learning.AdjDiffbleFunction.Oplus.A" class="extype">A</span>, <span name="provingground.learning.AdjDiffbleFunction.Oplus.C" class="extype">C</span>)) =&gt; (<span name="provingground.learning.AdjDiffbleFunction.Oplus.B" class="extype">B</span>, <span name="provingground.learning.AdjDiffbleFunction.Oplus.D" class="extype">D</span>)</span>)</span><span class="