(5steps total) Remark PrintForm Definitions Lemmas IteratedBinops Sections DiscrMathExt Doc
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At: sum via intseg split mid 1
  is_ident(; (x,y. x+y); 0)
By: Analyze THEN Reduce Concl

Generated subgoal:

1 1. x : 
  0+x = x & x+0 = x
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About:
intnatural_numberaddlambdaequaland
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(5steps total) Remark PrintForm Definitions Lemmas IteratedBinops Sections DiscrMathExt Doc