Um, equal is not an infix operator.
Try assume( equal(a,b) )
On 1/8/08, Thomas Widlar <twidlar at yahoo.com> wrote:
> We use Maxima version: 5.13.99rc2.
>
> The function "assume" works for <, > etc, but not for
> the operators "equal" and "notequal" as it should
> according to the online help.
>
> Example:
>
> (%i22) assume (z equal 3);
> Incorrect syntax: EQUAL is not an infix operator
> assumeSpace(zSpaceequalSpace
> ^
> (%i22) assume (z > 3);
> (%o22) [z>3]
> (%i23)
>
> What are we getting wrong?
>
> Thanks.
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