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

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At: inv funs iff inv funs 2 1 1

A,B:Type, f:(A

B), g:(B

A). g o f = Id

(

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

By:

UnivCD

Generated subgoal:

1 1. A : Type
2. B : Type
3. f : AB
4. g : BA
g o f = Id (x:A. g(f(x)) = x)
4 steps

About:

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