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At: is member of append lemma 1 2

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

x(eq) (L @ M)

By:
ListInd 3
THEN
Reduce 0


Generated subgoals:

1 False x(eq) M x(eq) M
26. u: T
7. v: T List
8. x(eq) v x(eq) M x(eq) (v @ M)
if eq(x,u) true else x(eq) v fi x(eq) M if eq(x,u) true else x(eq) (v @ M) fi

About:
listbtrueifthenelseassertapplyuniverseimpliesorfalse

(16steps) PrintForm Definitions list 3 jlc Sections Support(jlc) Doc