HoTT.Term,cod:provingground.HoTT.Term):Option[provingground.HoTT.Term]"></a><a id="inducOpt(Term,Term):Option[Term]"></a> <span class="permalink"><a href="../../provingground/induction/ExstInducStrucs.html#inducOpt(dom:provingground.HoTT.Term,cod:provingground.HoTT.Term):Option[provingground.HoTT.Term]" title="Permalink"><i class="material-icons"></i></a></span> <span class="modifier_kind"><span class="modifier">abstract </span> <span class="kind">def</span></span> <span class="symbol"><span class="name"