Home › Forums › Get Help › How do I ...? with Maple

Maple Solve Command

Posted on 2008-03-05 22:54 By jnoecker (2)
Categories:

Hello everyone.

 

I believe I have come across some kind of bug in Maple 11, and I was wondering if anyone could confirm that I am not crazy and that I am not using the software incorrectly.  When using the solve command, I get some very weird stuff:

 

evalf(solve(x^3+1/4 = x))

 

evalf(solve(x^3+.25 = x))

 

The second gives the correct answers.  The first gives three complex roots.  Am I doing something wrong?

 

Thanks,

John

 

‹ radnormal Can't send to MathMLViewer ›

Small imaginary part

Comment on 2008-03-05 23:12 from Alex Smith (Maple Rating 3 300)

With the results for your first command, notice the imaginary parts are on the order of 10^(-9). This is numerical garbage. If you throw away the insignificant imaginary parts, then the result is consistent with the second command.

So this is not a bug.

Solve vs. fsolve

Comment on 2008-04-07 15:20 from sreid (Maple Rating 1 11)

I've found solve to be buggy. This is not so bad, but if you try them both with fsolve, they have identical results.

Cheers,

Stephen

Thanks

Comment on 2008-03-05 23:54 from jnoecker (2)

Ah.. Thanks for that.  I didn't notice the first time and was very confused.

ineqaultiy

Comment on 2008-04-07 12:30 from sami_elmadssia (2)

please how to  solve inequality with three variable and absolute valu.

thinks for your help

Robert Israel's picture

inequality

Comment on 2008-04-07 18:57 from Robert Israel (Maple Rating 4 1555)

1) Since this question is not related to the previous one in this thread, it's a good idea to start a new thread.

2) It might be helpful if the question were a bit more specific.  Can you give us an example of the type of inequality you want to solve?

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.
}