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At: is member of append lemma 1 1 2 1 1
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
9. if eq(x,u) true else x(eq) (v @ M) fi
10. eq(x,u) = true

True x(eq) M
By: DNth 1 0
Generated subgoals:

None

About:
listboolbtrueifthenelseassertapplyuniverseequalimpliesortrue

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