Re: [isabelle] Proving with Goal.prove

On Fri, Oct 1, 2010 at 3:05 AM, Cezary Kaliszyk
<cezarykaliszyk at> wrote:
> The following does work:
>  val {prop,...} = Thm.rep_thm st
>  val t = Goal.prove ctxt [] [] (Logic.unprotect
> (Logic.strip_assums_concl prop)) (fn _ => tac)
> But the above is somehow very low-level, if you want to look at
> subparts of the goal in a tactic
> in a convenient way you may want to have a look at the Subgoal.FOCUS
> family of combinators.

If I understand correctly, does Logic.unprotect remove the prop marker
from the main conclusion (conclusion of prop)? Is the concl of a focus
supposed to be the main conclusion, but with the prop marker removed?



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