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At: l before-iff 1

1. T: Type
2. L: T List
x,y:T. x before y nil (L1,L2,L3:T List. nil = (L1 @ [x] @ L2 @ [y] @ L3))

By:
Auto
THEN
Obvious


Generated subgoals:

None

About:
listconsniluniverseequalallexists

(14steps total) PrintForm Definitions Lemmas graph 1 1 Sections Graphs Doc