Nuprl - Proof: delete fenum value wf gen 1 1

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At: delete fenum value wf gen 1 1

1. P :

Prop
2. Q :

Prop
3. f : {u:

| P(u) }

{v:

| Q(v) }
4. Inj({k:

| P(k) }; {k:

| Q(k) }; f)
5. m : {u:

| P(u) }
6. k : {v:

| Q(v) }
7. i : {u:

| P(u) &

u = m }

if f(i)=

f(m) else f(i) fi

{v:

| Q(v) &

v = k }

By:	ApFun: f to: m THEN Analyze-1 THEN ApFun: f to: i THEN Analyze-1 THEN i {u:\| P(u) & u = m } Asserted THEN 2 Times Analyze-1

Generated subgoal:

1 8. f(m)
9. Q(f(m))
10. f(i)
11. Q(f(i))
12. i
13. P(i)
14. i = m
  if f(i)=k f(m) else f(i) fi  {v:| Q(v) & v = k }
5 steps

About:

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