> that have recursive definition of the recursion and induction functions, the former for the case of a
single introduction rule. Traits <a href="induction/ConstructorSeqMapper.html" name="provingground.induction.ConstructorSeqMapper" id="provingground.induction.ConstructorSeqMapper" class="extype">ConstructorSeqMapper</a> and <a href="induction/ConstructorPatternMapper.html" name="provingground.induction.ConstructorPatternMapper" id="provingground.induction.ConstructorPatternMapper" class="extype">Construc