Nuprl - Proof: compose iter inverses 1 2 1

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At: compose iter inverses 1 2 1

1. A : Type
2.

f,g:(A

A). InvFuns(A;A;f;g)

(

, x:A. g{

i}(f{

i}(x)) = x)
3. f : A

A
4. g : A

A
5. InvFuns(A;A;f;g)
6. i :

7. x : A

i}(f{

i}(x)) = x

By:	BackThru: Hyp:2

Generated subgoals:

None

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