Nuprl - Proof: nsub inj factorial2 2 1 1

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At: nsub inj factorial2 2 1 1

1. b :

2. 0<b
3. (

(b-1) inj

(b-1)) ~

((b-1)!)

(

((b-1)!)) ~

(b!)

By:	Rewrite by Thm* a,b:. (ab) ~ (ab)

Generated subgoal:

1 (b(b-1)!) ~ (b!)
1 step

About:

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