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At: is member of append lemma 1 1 2

1. T: Type
2. eq: {T}
3. L: T List
4. M: T List
5. x: T
6. u: T
7. v: T List
8. x(eq) (v @ M) x(eq) v x(eq) M

if eq(x,u) true else x(eq) (v @ M) fi if eq(x,u) true else x(eq) v fi x(eq) M

By: Analyze 0

Generated subgoal:

19. if eq(x,u) true else x(eq) (v @ M) fi
if eq(x,u) true else x(eq) v fi x(eq) M

About:
listbtrueifthenelseassertapplyuniverseimpliesor

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