| Who Cites nth tl? |
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nth_tl | Def 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 |
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tl | Def tl(l) == Case of l; nil nil ; h.t t |
| | Thm* A:Type, l:A List. tl(l) A List |
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le_int | Def ij == j<i |
| | Thm* i,j:. (ij) |
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lt_int | Def i<j == if i<j true ; false fi |
| | Thm* i,j:. (i<j) |
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bnot | Def b == if b false else true fi |
| | Thm* b:. b |