No.
When a symbol is declared INTEGER, automatic simplifications can
exploit this fact. For example, SIN(n*%pi) simplifies to 0 if n is
declared INTEGER. A symbol can be declared INTEGER if it is known to
represent an integer. INTEGER is a member of the FEATURES list.
It can be asserted with DECLARE, withdrawn with REMOVE, and detected
with FEATUREP.
(C1) declare(x,integer);
(D1) DONE
(C2) FEATUREP(x,integer);
(D2) TRUE
Dan Stanger
a9104910@unet.univie.ac.at wrote:
> Hi folks!
>
> I'm just starting...
>
> When I say
>
> declare(x,integer);
>
> then
>
> integerp(x);
>
> gives false.
>
> Does this mean, that integerp(x) is intended to give true if x is an
> instance of an integer?
>
> Thanks, Martin
>
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