(17steps total) Remark PrintForm Definitions Lemmas DiscreteMath Sections DiscrMathExt Doc
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At: nsub inj factorial tail 1 2
1. a : 
2. a1:. a1<a  (b:. (a1 inj b) ~ (b!a1))
3. b : 
4. ab
  (a inj b) ~ (b!a)
By: Rewrite by Thm*  m,k:. k<m  k!m = 0  

Generated subgoal:

1   (a inj b) ~ 0
3 steps

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

(17steps total) Remark PrintForm Definitions Lemmas DiscreteMath Sections DiscrMathExt Doc