[Maxima] integrate: is this question a bug?
raymond.toy at ericsson.com
Wed Jul 18 11:50:53 CDT 2007
Edwin Woollett wrote:
> Hi Mailing List,
> Maxima asks an apparently meaningless question for the following definite integral:
> (using v. 12.0 with windows xp)
> (%i1) myint: integrate( exp( sqrt(x) ), x, 1, 5);
> Is yx positive or negative?
> Is yx - 1 positive, negative, or zero?
> (%o1) 2 (sqrt(5) - 1) %e
> Are these questions a bug??
I consider these bugs. For the record, when doing definite integrals,
maxima is trying a substitution here. It uses the internal variable yx
and wants to solve the equation yx = exp(sqrt(x)) for x. I guess it
needs to know the sign of yx to solve this.
I don't know how to fix this problem.
Does Macsyma have this problem?
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