(9steps total) PrintForm Definitions Lemmas DiscreteMath Sections DiscrMathExt Doc
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At: nsub bij least preimage inverse 1 1

1. a : 
2. f : a bij a
3. f  a onto a
4. f  aa
5. Bij(aaf)  [not for witness]
  InvFuns(a;a;f;y.least x:f(x)=y)


By: Use:[a | a | f]
Inst: Thm*  f:(a onto b). (y.least x:f(x)=y b inj a
THEN
Analyze-1


Generated subgoal:

1 6. (y.least x:f(x)=y aa
7. Inj(aay.least x:f(x)=y)  [not for witness]
  InvFuns(a;a;f;y.least x:f(x)=y)

6 steps

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

(9steps total) PrintForm Definitions Lemmas DiscreteMath Sections DiscrMathExt Doc