Nuprl - Proof: compose iter sum rw

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At: compose iter sum rw

A:Type, x:A, f:(A

A), k:

, i:{0...k}. f{

k}(x) = f{

i}(f{

k-i}(x))

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

Generated subgoal:

1 1. A : Type
2. x : A
3. f : AA
4. i,j,k:. k = i+j f{i}(f{j}(x)) = f{k}(x)
5. k :
6. i : {0...k}
f{k}(x) = f{i}(f{k-i}(x))
1 step

About:

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