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At: is member of append lemma


T:Type, eq:{T}, L,M:T List, x:T. x(eq) (L @ M) x(eq) L x(eq) M

By: UnivCD

Generated subgoal:

11. T: Type
2. eq: {T}
3. L: T List
4. M: T List
5. x: T
x(eq) (L @ M) x(eq) L x(eq) M

About:
listassertuniverseorall

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