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At: sublist tail1 1 1 1

1. T: Type
2. eq: {T=}
3. u: T
4. v: T List

xv.if eq(x,u) true else x(eq) v fi

By: Inst Thm* eq:{T=}, P:(TProp), L:T List. xL.P(x) (z:T. z(eq) L P(z)) [T;eq;z.if eq(z,u) true else z(eq) v fi;v] THENL [Auto;Auto;Analyze 2;Auto;Id]

Generated subgoal:

15. xv.(z.if eq(z,u) true else z(eq) v fi)(x) (z:T. z(eq) v (z.if eq(z,u) true else z(eq) v fi)(z))
xv.if eq(x,u) true else x(eq) v fi

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(9steps) PrintForm Definitions Lemmas list 3 jlc Sections Support(jlc) Doc