Nuprl - Proof: dedekind inf imp inf 1 1 1

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At: dedekind inf imp inf 1 1 1

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

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

(

x:A. f(x) = a)

Inj(

; A;

i.f{

i}(a))

By:	n1,n2:. f{n1}(a) = f{n2}(a) A n1<n2 Asserted

Generated subgoals:

1 6. n1 :
7. n2 :
8. f{n1}(a) = f{n2}(a)
  n1<n2
6 steps

2 6. n1,n2:. f{n1}(a) = f{n2}(a)  n1<n2
  Inj(; A; i.f{i}(a))
2 steps

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

(12steps total) PrintForm Definitions Lemmas DiscreteMath Sections DiscrMathExt Doc