Nuprl - Proof: compose iter sum comp 1

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At: compose iter sum comp 1

1. A : Type
2. f : A

A
3. i :

4. j :

5. k :

6. k = i+j
7. x : A

i}(f{

j}(x)) = f{

k}(x)

By:	BackThru: Thm* x:A, f:(AA), i,j,k:. k = i+j f{i}(f{j}(x)) = f{k}(x)

Generated subgoals:

None

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IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html