Thank you very much, Barton. help(solve_rat_ineq) doesn't work, so I
looked at the code and, if I understood correctly, it seems to me that
it works only on inequalities in a single variable without parameters.
Is this correct? Instead, I would like to solve something like:
a*(x+7)-b < 0
under some constraints, say, assume(a>0).
Best Regards
Sergio
2009/10/7 Barton Willis <willisb at unk.edu>:
> For inequalities involving rational expressions, you can try:
>
> ?(%i6) load("solve_rat_ineq.mac")$
>
> ?(%i7) solve_rat_ineq((x+5)*(x-9) >= 0);
> ?(%o7) [[x<=-5],[x>=9]]
>
> ?(%i8) solve_rat_ineq((x+5) /(x-9) >= 4);
> ?(%o8) [[x>9,x<=41/3]]
>
> ?(%i10) solve_rat_ineq((x+5)*(x-13)/(x-9) >= 4);
> ?(%o10) [[x>=6-sqrt(65),x<9],[x>=sqrt(65)+6]]
>
> Barton
>
> -----maxima-bounces at math.utexas.edu wrote: -----
>
>>To:?Maxima?List?<maxima at math.utexas.edu>
>>From:?deltaquattro at gmail.com
>>Sent?by:?maxima-bounces at math.utexas.edu
>>Date:?10/07/2009?03:41AM
>>Subject:?[Maxima]?Inequalities
>>
>>Are?there?commands?to?solve?inequalities?in?Maxima??Thanks,
>>
>>Best?Regards
>>
>>Sergio
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>
>