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TheoremName
Thm* L:(A+B) List, l1,l2:A List. mapoutl(L) = (l1 @ l2) (L1,L2:(A+B) List. L = (L1 @ L2) & mapoutl(L1) = l1 & mapoutl(L2) = l2)[mapoutl_is_append]
cites
Thm* L1,L2:(A+B) List. mapoutl(L1 @ L2) ~ (mapoutl(L1) @ mapoutl(L2))[mapoutl_append]

graph 1 1 Sections Graphs Doc