(8steps total) Remark PrintForm Definitions Lemmas DiscreteMath Sections DiscrMathExt Doc
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At: nsub surj least preimage total gen 1 1

1. B : Type
2. e : BB
3. IsEqFun(B;e)
4. a : 
5. f : aB
6. Surj(aBf)
7. y : B
  (least x:. (f(x)) e y a


By: BackThru: Thm*  k:p:{p:(k)| i:kp(i) }. (least i:p(i))  k


Generated subgoal:

1   (x.(f(x)) e y {p:(a)| i:ap(i) }
5 steps

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

(8steps total) Remark PrintForm Definitions Lemmas DiscreteMath Sections DiscrMathExt Doc