Nuprl - Proof: negnegelim imp notfin imp unb inf 1 2 1

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At: negnegelim imp notfin imp unb inf 1 2 1

1.

P:Prop.

P

P
2. A : Type
3.

(

n:

. A ~

n)
4. k :

5. 0<k
6. f :

(k-1)

A
7. Inj(

(k-1); A; f) [not for witness]

a:A.

i:

(k-1). f(i)

a

By:	BackThru: Hyp:1

Generated subgoal:

1 (a:A. i:(k-1). f(i) a)
8 steps

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

(22steps total) PrintForm Definitions Lemmas DiscreteMath Sections DiscrMathExt Doc