Nuprl - Proof: dedekind inf imp inf 1 1 1 2 1

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At: dedekind inf imp inf 1 1 1 2 1

1. A : Type
2. a : A
3. f : A

A
4. Inj(A; A; f)
5.

(

x:A. f(x) = a)
6.

n1,n2:

. f{

n1}(a) = f{

n2}(a)

n1<n2
7. i1 :

8. i2 :

9. f{

i1}(a) = f{

i2}(a)

i1 = i2

By:	Inst: Hyp:6 Using:[i1 \| i2] THEN Inst: Hyp:6 Using:[i2 \| i1]

Generated subgoals:

None

About:

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