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At: sublist tail1 1 1 1 1 1 1 1

1. T: Type
2. eq: TT
3. (x,y:T. eq(x,y) x = y) & eq TT
4. u: T
5. v: T List
6. xv.if eq(x,u) true else x(eq) v fi (z:T. z(eq) v if eq(z,u) true else z(eq) v fi)
7. z: T
8. z(eq) v = true

if eq(z,u) true else z(eq) v fi

By: HypSubst 8 0

Generated subgoal:

1 if eq(z,u) true else true fi

About:
listboolbtrueifthenelseassertapply
functionuniverseequalmemberimpliesand
all

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