(12steps total) PrintForm Definitions Lemmas DiscreteMath Sections DiscrMathExt Doc
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At: compose iter surjection 1 1
1. A : Type
2. f : AA
3. Surj(A; A; f)
  Surj(A; A; f{0})
By: Rewrite by Thm*  f:(AA). f{0} = Id

Generated subgoal:

1   Surj(A; A; Id)
2 steps

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