(31steps total) Remark PrintForm Definitions Lemmas DiscreteMath Sections DiscrMathExt Doc
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At: card nsub inj vs lopped 1 1 1 1

1. a : 
2. b : 
3. f : a inj b
  f(a-1)  b


By: Analyze-1


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(31steps total) Remark PrintForm Definitions Lemmas DiscreteMath Sections DiscrMathExt Doc