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At: comp id r 1
  A,B:Type, f:(AB). f o Id = f  AB
By: (Unfolds [`identity`;`compose`] 0 THEN UnivCD) THEN (Reduce 0)

Generated subgoal:

1 1. A : Type
2. B : Type
3. f : AB
  (x.f(x)) = f
1 step

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

(3steps total) PrintForm Definitions Lemmas fun 1 Sections StandardLIB Doc