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

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

IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At: negnegelim imp notfin imp unb inf 1 2 1 1 1 1 1 2

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]
8.

a:A.

(

i:

(k-1). f(i)

a)

Surj(

(k-1); A; f)

By:	SimilarTo: Hyp:8

Generated subgoal:

1 8. b : A
9. (i:(k-1). f(i) b)
a:(k-1). f(a) = b
2 steps

About:

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

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