PrintForm Definitions Lemmas DiscreteMath Sections DiscrMathExt Doc
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At: factorial via intseg step rw
  k:. k! = k(k-1)!  
By: Auto THEN BackThru: Thm*  k,n:. k = n+1  k! = kn!  

Generated subgoals:

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

PrintForm Definitions Lemmas DiscreteMath Sections DiscrMathExt Doc