Nuprl - Proof: compose wf surj 1

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At: compose wf surj 1

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

C
5. Surj(B; C; f)
6. g : A

B
7. Surj(A; B; g)

Surj(A; C; f o g)

By:	BackThru: Thm* Surj(A; B; g) Surj(B; C; f) Surj(A; C; f o g)

Generated subgoals:

None

About:

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