| Who Cites list to function? |
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list_to_function | Def seq:l(i) == l[i] |
| | Thm* l:A List. seq:l ||l||A |
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select | Def l[i] == hd(nth_tl(i;l)) |
| | Thm* A:Type, l:A List, n:. 0n n<||l|| l[n] A |
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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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hd | Def hd(l) == Case of l; nil "?" ; h.t h |
| | Thm* A:Type, l:A List. ||l||1 hd(l) A |
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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 |