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Optimization and fraction problem - Wrong sign when trying different optimization and/or fracction convertion for some integrals - Messages

#1 Posted: 7/25/2013 6:10:53 PM
Diego Jarrín

Diego Jarrín

7 likes in 14 posts.

Group: User

I don't know if this problem has been already reported, but I see some weird behavior with some simple integrals, this happen when I try different kind of optimizations (symbolic, numeric or none) at the same time I try different kind of fraction convertions(decimal, fracction or auto), when I try the eval function I get the same problem.
I attach a file done in the latest stable version (0.96 build: 4868), showing this behavior.
Wrong_sign_1.sm (13 KiB) downloaded 61 time(s).
Ecuadorian Electronic engineer and MBA student at Salesian Polytechnic University.
2 users liked this post
sergio 7/26/2013 3:55:00 AM, Martin Kraska 7/26/2013 5:22:00 AM
#2 Posted: 7/26/2013 1:09:37 AM
Radovan Omorjan

Radovan Omorjan

325 likes in 2052 posts.

Group: Moderator

Confirmed in 096_4909

It seems that wrong result will be when the Fractions: Fraction/Auto and Optimization: Numeric

Regards,
Radovan
When Sisyphus climbed to the top of a hill, they said: "Wrong boulder!"
1 users liked this post
sergio 7/26/2013 3:55:00 AM
#3 Posted: 9/20/2013 4:07:28 PM
Martin Kraska

Martin Kraska

1222 likes in 2150 posts.

Group: Moderator

The problem is solved by the Maxima plugin. However, currently you need to explicitly let Maxima take over the functions, otherwise the integrals will work the old way.

[EDIT] Adaption to current state of Maxima plugin
takeover.PNG
Martin Kraska Pre-configured portable distribution of SMath Studio: https://en.smath.info/wiki/SMath%20with%20Plugins.ashx
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