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Theorem
Name
Thm*
L:(A+B) List, a:A. mapoutl(L) = [a]
(
L1,L2:(A+B) List. L = (L1 @ [inl(a)] @ L2) & mapoutl(L1) = nil & mapoutl(L2) = nil)
[mapoutl_is_singleton]
cites
Thm*
L1,L2:(A+B) List. mapoutl(L1 @ L2) ~ (mapoutl(L1) @ mapoutl(L2))
[mapoutl_append]
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