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

#1 Pubblicato: 25/07/2013 18:10:53
Diego Jarrín

Diego Jarrín

7 apprezzamenti in 14 post.

Gruppo: 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 (13,11 KiB) scaricato 1344 volta(e).
Ecuadorian Electronic engineer and MBA student at Salesian Polytechnic University.
2 utenti hanno apprezzato questo post
sergio 26/07/2013 03:55:00, Martin Kraska 26/07/2013 05:22:00
#2 Pubblicato: 26/07/2013 01:09:37
Radovan Omorjan

Radovan Omorjan

325 apprezzamenti e 1 disapprezzamenti in 2.052 post.

Gruppo: 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 utenti hanno apprezzato questo post
sergio 26/07/2013 03:55:00
#3 Pubblicato: 20/09/2013 16:07:28
Martin Kraska

Martin Kraska

1.361 apprezzamenti in 2.275 post.

Gruppo: 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
Technische Mechanik mit SMath Studio: https://link.springer.com/book/10.1007/978-3-658-50592-9
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