ingground.HoTT.Subs[VV],V&lt;:provingground.HoTT.Typ[VV]withprovingground.HoTT.Subs[V]](those:V):provingground.HoTT.SigmaTyp[UU,VV]" title="Permalink"><i class="material-icons"></i></a></span> <span class="modifier_kind"><span class="modifier"></span> <span class="kind">def</span></span> <span class="symbol"><span class="name" title="gt4s: $plus$plus">++</span><span class="tparams">[<span name="UU">UU &gt;: <a href="../HoTT$$Typ.html" name="provingground.HoTT.Typ" id="provingground.HoTT.Typ" class="extyp