I suspect lcsymtacs.rfs[] (aka REV_FULL_SIMP_TAC (srw_ss()) []) will do it
in your particular example.
Alternatively, you could use REPEAT BasicProvers.VAR_EQ_TAC THEN
FULL_SIMP_TAC std_ss [].
These will all change your goal state in more ways than one.
On Tue, May 13, 2014 at 9:01 AM, masoume tajvidi <mas.tajv...@gmail.com>wrote:
> Hi ,
> I have a subgoal like this:
>
> F
> ------------------------------------
> 0. (winner' = w) ⇒ (winner = w)
> 1. Max_vote C' v' = (winner,max)
> 2. Max_vote C' v = (winner',max')
> 3. LENGTH v' = LENGTH v
> 4. w ≠ 0
> 5. ∀n. n < LENGTH v ⇒ (EL n v' = w) ∨ (EL n v = EL n v')
> 6. Count w v > max'
> 7. T
> 8. Count w v' = max
> 9. SUC C' = w
> 10. Count w v' ≥ Count w v
> 11. winner' ≤ C'
> 12. winner ≤ C'
> 13. (SUC C' = w) ⇒ ∀n. n ≤ C' ⇒ n ≠ w
>
> I need to reach *∀n. n ≤ C' ⇒ n ≠ w * as another assumption.
> I think from Assumption 9 and 13 it is inferable, but do not know what
> Tactic to use.
> Could anybody suggest me some Tactics?
>
> Thank you:)
>
>
>
>
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