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At:
delete fenum value comp1 gen P,Q:(Prop), f:({u:| P(u) }{v:| Q(v) }).
Inj({u:| P(u) }; {u:| Q(u) }; f)
(m:{u:| P(u) }, k:{v:| Q(v) }, i:{u:| P(u) & u = m }.
(f(i) = k (
((Replace value k by f(m) in f)(i) = f(m) {v:| Q(v) & v = k })
1. P : Prop
2. Q : Prop
3. f : {u:| P(u) }{v:| Q(v) }
4. Inj({u:| P(u) }; {u:| Q(u) }; f)
5. m : {u:| P(u) }
6. k : {v:| Q(v) }
7. i : {u:| P(u) & u = m }
8. f(i) = k (Replace value k by f(m) in f)(i) = f(m) {v:| Q(v) & v = k }
5 steps
About:
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html