(8steps total) PrintForm Definitions Lemmas NuprlPrimitives Sections NuprlLIB Doc
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At: sfa doc ycomb factorial typing 2 1

1. x : 
2. x1:x1<x  Y((f,x. if x=0 1 else xf(x-1) fi),x1 
  Y((f,x. if x=0 1 else xf(x-1) fi),x 


By: Compute
CoY((f,x. if x=0 1 else xf(x-1) fi),x)
Co*
Coif x=0 1 else xY((f,x. if x=0 1 else xf(x-1) fi),x-1) fi


Generated subgoal:

1   if x=0 1 else xY((f,x. if x=0 1 else xf(x-1) fi),x-1) fi  
4 steps

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

(8steps total) PrintForm Definitions Lemmas NuprlPrimitives Sections NuprlLIB Doc