problem([]==>x:pnat=>y:pnat=>x=0 in pnat=>times(x,y)=0 in pnat,
normalize([normal(univ_intro),normal(univ_intro),normal(imply_intro)]),lambda(x,lambda(y,lambda(v0,_41098))),
[problem([x:pnat,y:pnat,v0:x=0 in pnat]==>times(x,y)=0 in pnat,
 sym_eval(equal(v0,right)then[normalize_term([reduction([1,1],[times1,equ(pnat,left)])])])then[elementary(identity)],su(su(axiom,[times1 of y],[v0]),[term_of(times1)],[times1]),
 [
 ]) ext _41098
]).
