const nat_primrec : set (set set set) set set const ordsucc : set set const Empty : set const mul_SNo : set set set term * = mul_SNo infix * 2291 2290 term exp_SNo_nat = \x:set.nat_primrec (ordsucc Empty) \y:set.mul_SNo x axiom nat_primrec_0: !x:set.!g:set set set.nat_primrec x g Empty = x const SNo : set prop claim !x:set.SNo x -> exp_SNo_nat x Empty = ordsucc Empty