Nuprl - Proof: inv funs iff inv funs 2 1 1 1 2

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At: inv funs iff inv funs 2 1 1 1 2

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

B
4. g : B

A
5.

x:A. g(f(x)) = x

g o f = Id

By:

Ext

Generated subgoal:

1 6. x : A
(g o f)(x) = Id(x)
1 step

About:

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