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

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At: inv funs iff inv funs 2 1 1 1

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

B
4. g : B

g o f = Id

(

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

By:

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Generated subgoals:

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

2 5. x:A. g(f(x)) = x
g o f = Id
2 steps

About:

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

1	5. g o f = Id 6. x : A g(f(x)) = x	1 step
2	5. x:A. g(f(x)) = x g o f = Id	2 steps