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[roconnor AT theorem.ca]

On Mon, 12 Sep 2005, Adam Chlipala wrote:

>    e1 : Bvector 32
>    e2 : Bvector 32
>    ============================
>     (beven e1 || beven e2) = beven (band32 e1 e2)
>
> destruct e1.
>
> I get the error:
>
> User error: Cannot solve a second-order unification problem
>
> Can anyone suggest how I might go about proving this goal?

Think about what the two goals will be after the destruct.  Write out what
they are.  Then you will realize it will be neccesary to

unfold band32.

-- 
Russell O'Connor                                      <http://r6.ca/>
``All talk about `theft,''' the general counsel of the American Graphophone
Company wrote, ``is the merest claptrap, for there exists no property in
ideas musical, literary or artistic, except as defined by statute.''