Nuprl - Proof: nsub inj factorial tail 1 1 1 1 1 1 1

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At: nsub inj factorial tail 1 1 1 1 1 1 1

1. a :

2.

a1:

. a1<a

(

b:

. (

a1 inj

b) ~

(b!a1))
3. b :

4. a

b
5. a = 0
6.

a

False

By:

Analyze-1

Generated subgoals:

None

About:

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

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