Better, in my opinion, is to use
e( qexists_tac`0` );
which parses the quotation in the context of the goal, so you don't need to
give an explicit type annotation.
On 13 April 2017 at 14:11, Thomas Tuerk <tho...@tuerk-brechen.de> wrote:
> Hi Liu,
>
> you have realLib open. "0" can be parsed as either a real or a num.
> That's why you get the warning that two resolutions are possible. The
> "EXISTS_TAC ``0``" fails, because ``0`` is parsed as a real, while you
> need a num. An explicit type annotation does the trick: So use
>
> e (EXISTS_TAC ``0:num``);
>
> Cheers
>
> Thomas
>
>
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