Nuprl - Proof: compose iter sum rw 1

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At: compose iter sum rw 1

1. A : Type
2. x : A
3. f : A

A
4.

i,j,k:

. k = i+j

i}(f{

j}(x)) = f{

k}(x)
5. k :

6. i : {0...k}

k}(x) = f{

i}(f{

k-i}(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

About:

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