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Who Cites nth tl?
nth_tlDef  nth_tl(n;as) == if n0 as else nth_tl(n-1;tl(as)) fi  (recursive)
Thm*  A:Type, as:A List, i:. nth_tl(i;as)  A List
tlDef  tl(l) == Case of l; nil  nil ; h.t  t
Thm*  A:Type, l:A List. tl(l)  A List
le_intDef  ij == j<i
Thm*  i,j:. (ij)  
lt_intDef  i<j == if i<j true ; false fi
Thm*  i,j:. (i<j)  
bnotDef  b == if b false else true fi
Thm*  b:. b  

Syntax:nth_tl(n;as) has structure: nth_tl(n; as)

About:
listnillist_indboolbfalse
btrueifthenelseintnatural_numbersubtractless
recursive_def_noticeuniversememberall!abstraction
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WhoCites Definitions DiscreteMath Sections DiscrMathExt Doc