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- par lukamar
- mar. avr. 11, 2023 12:14 pm
- Forum : Bugs
- Sujet : factor error
- Réponses : 1
- Vues : 1624
factor returns an error with this command:
Code : Tout sélectionner
factor(((-i)*z*exp(z)**2+i*z)/((-1-i)*sqrt(pi*z)*abs(z)*exp(z)))
Same with collect.
- par lukamar
- jeu. nov. 24, 2022 1:42 pm
- Forum : Bugs
- Sujet : Different Taylor expansions for equivalent expressions
- Réponses : 1
- Vues : 1067
Hi,
There is something wrong with series/taylor command. When I enter
I get
\(\frac{1}{x^{2}}-\frac{2}{3}+x^{2} \mathrm{order\_size}\left(x\right)\) as expected, but when I enter
only
\(x^{2} \mathrm{order\_size}\left(x\right)\) is returned.
Luka
- par lukamar
- mar. nov. 15, 2022 3:08 pm
- Forum : Bugs
- Sujet : using assume can cause crash during eval
- Réponses : 4
- Vues : 1274
Thanks for clearing this up. My example is quite pathological, but maybe assume should report a warning when conflicting assumptions from the user are detected.
- par lukamar
- sam. sept. 24, 2022 1:35 am
- Forum : Xcas - English
- Sujet : Latex possible bug?
- Réponses : 6
- Vues : 2202
New latex conversion omits parentheses when applying functions to simple arguments like e.g. x. I will add an additional condition that the argument must be a one-letter symbol, which should make the output better (one-letter symbols are typeset in italic, so removing parentheses wouldn't affect rea...
- par lukamar
- sam. août 27, 2022 2:45 pm
- Forum : Bugs
- Sujet : locus error
- Réponses : 9
- Vues : 2335
Another thing: entering comments with Alt+C does not work in xcas anymore. The only effect of Altc+C is that the current entry changes label color to blue.
- par lukamar
- sam. août 27, 2022 2:44 pm
- Forum : Bugs
- Sujet : locus error
- Réponses : 9
- Vues : 2335
This also may be a bug: the command
returns an empty list. However, if I remove the second argument (the range for x), all is ok.
- par lukamar
- jeu. août 25, 2022 10:10 am
- Forum : Bugs
- Sujet : locus error
- Réponses : 9
- Vues : 2335
Also, this command hangs:
- par lukamar
- jeu. août 25, 2022 9:48 am
- Forum : Bugs
- Sujet : locus error
- Réponses : 9
- Vues : 2335
But why plotinequation fails? This is a single commandline (with official Xcas 1.7.0 in Ubuntu, but also with compiled 1.9.0):
Code : Tout sélectionner
plotinequation(x^2-y^2<3,[x=-2..2,y=-2..2],xstep=0.1,ystep=0.1)
It does not display the graphics, but also not an error:
- par lukamar
- mer. août 24, 2022 11:00 pm
- Forum : Bugs
- Sujet : locus error
- Réponses : 9
- Vues : 2335
Indeed, when the commands are in separate entries it works.
I have fixed the bug, thanks!
- par lukamar
- lun. août 22, 2022 11:38 am
- Forum : Bugs
- Sujet : locus error
- Réponses : 9
- Vues : 2335
locus command in 1.7.0 as well as in 1.9.0 is failing on all examples, e.g.
This returns an error.
- par lukamar
- sam. juil. 09, 2022 3:02 pm
- Forum : Bugs
- Sujet : Build error for 1.9-13 on Linux
- Réponses : 7
- Vues : 3100
It's strange that calling fltk_view, which is defined in Xcas1.h, causes no problems and Xcas1.h includes Graph.h.
A fix would be to uncomment the line 21 in global.h, which defines USE_OBJET_BIDON.
- par lukamar
- mer. juin 29, 2022 8:10 am
- Forum : Bugs
- Sujet : parser problem
- Réponses : 5
- Vues : 1981
OK, it's not a big deal. But maybe a fix would be to print the equal-symbolic expression with spaces around = when unary_function_ptr is detected in both sides of the equality? I'm suggesting this for programmatic use of giac, where gen::print is called to write an expression to a string which is su...