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l[i] == hd(nth_tl(i;l))
is mentioned by
Thm*
s:T List. 0 < ||s||
(s ~ (firstn(||s||-1;s) @ [s[(||s||-1)]]))
[list-decomp-last]
Thm*
i,j:
, k:
(j-i). upto(i;j)[k] = i+k
[select_upto]
Thm*
L:T List, P:(T
). (
x
L.P(x))
(
i:
||L||. P(L[i]))
[assert_l_bexists]
Thm*
L:T List, P:(T
). (
x
L.P(x))
(
i:
||L||. P(L[i]))
[assert_l_ball]
In prior sections:
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