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At: nsub surj imp a rev inj

  b,a:f:(a onto b). (y.least x:f(x)=y b inj a

By: Analyze
THEN
Use:[B:= b | e(i;j):= i=j]
Inst: 
Thm*  e:(BB). 
Thm*  IsEqFun(B;e)
Thm*  
Thm*  (a:f:(a onto B). (y.least x:. (f(x)) e y B inj a)
THEN
BackThru: Thm*  IsEqFun(b;i,ji=j)


Generated subgoals:

None

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

PrintForm Definitions Lemmas DiscreteMath Sections DiscrMathExt Doc