Jove! it's stupidity on my part.
Thanks
Le jeudi 13 février 2020 16:16:23 UTC+1, Jean-François Ingenbleek a écrit :
>
> var("u,v,l",domain=RR)
> sigma = vector([u*cos(v),u*sin(v),l*u])
> Dsigma = matrix([[diff(s,u) for s in sigma],[diff(s,v) for s in
> sigma]]).transpos
var("u,v,l",domain=RR)
sigma = vector([u*cos(v),u*sin(v),l*u])
Dsigma = matrix([[diff(s,u) for s in sigma],[diff(s,v) for s in
sigma]]).transpose()
print(Dsigma)
EFG = (Dsigma.transpose())*Dsigma
EFG.simplify_trig()
print(EFG)
gives
[ cos(v) -u*sin(v)]
[ sin(v) u*cos(v)]
[l
Excuse me, I forgot the question:
maybe there is simpler, but I do not understand where the error lies.
Thank you in advance for your help
Le jeudi 6 février 2020 16:45:06 UTC+1, Jean-François Ingenbleek a écrit :
>
> I would just like to calculate the norm of the vector tangent to a
ike you have MiKTeX: C:\Program Files (x86)\MiKTeX
> 2.9\miktex\bin\;
>
> Which is strange because I also have MiKTeX, but was only able to
> reproduce the problem when I installed texlive instead. It's possible the
> problem only arises in newer versions, and my MiKTeX is a bit
not find TexLive
help is really welcome
Le jeu. 30 janv. 2020 à 15:46, Jean-François Ingenbleek <
jingenb...@gmail.com> a écrit :
> a better solution, is to remove texlive from your $PATH environment
> variable
>
> hum, hum... how to do that?
> thanks in advance
>
> Le
anuary 30, 2020 at 9:27:56 AM UTC+1, Dima Pasechnik wrote:
>>>
>>>
>>>
>>> On Thu, 30 Jan 2020, 08:09 Jean-François Ingenbleek,
>>> wrote:
>>>
>>>> indeed
>>>>
>>>> Norton/McAfee/Symantec antivirus or antispyw
for your quick intervention
Le mercredi 29 janvier 2020 14:21:03 UTC+1, Jean-François Ingenbleek a
écrit :
>
> Be careful! Do not go to version 9 if you work under windows8 !!
>
> an instruction as simple as
>
> plot(x*sin(1/x),x,-2,2,plot_points=500)
>
> gives
>
> opt/sa
Be careful! Do not go to version 9 if you work under windows8 !!
an instruction as simple as
plot(x*sin(1/x),x,-2,2,plot_points=500)
gives
opt/sagemath-9.0/local/lib/python3.7/site-packages/matplotlib/font_manager.py:281:
UserWarning: Matplotlib is building the font cache using fc-list. This
No nothing helps ... it doesn't work better.
I think that you should not switch to sagemath9 if it is practically
impossible to use matplotlib !!
Le mardi 28 janvier 2020 13:07:08 UTC+1, E. Madison Bray a écrit :
>
> On Saturday, January 25, 2020 at 5:03:54 PM UTC+1, Jean-Fr
hich steps did you follow to install SageMath
>
> Assuming that for 3 you use the windows binary (please
> confirm), I reported the issue on
>
> https://github.com/sagemath/sage-windows/issues/42
>
> It would be nice to know 1 as well.
>
> Best
> Vincent
>
> Le 18
alas, it does not work at all ... I am a little lost in the multiple
directories of sagemath (windows 8.1).
You must warn against using sagemath 9.0 yet !!
Le lun. 20 janv. 2020 à 11:05, Dima Pasechnik a écrit :
> On Mon, Jan 20, 2020 at 9:44 AM Jean-François Ingenbleek
> wrote:
> &
More than an hour that the program displays the message ... is this normal?
thanks a lot
Le samedi 18 janvier 2020 16:18:59 UTC+1, dimpase a écrit :
>
> On Sat, Jan 18, 2020 at 02:00:06AM -0800, Jean-François Ingenbleek wrote:
> > G = Graph({'A':['B','C']})
> > G.sho
G = Graph({'A':['B','C']})
G.show()
give this strange message
/opt/sagemath-9.0/local/lib/python3.7/site-packages/matplotlib/font_manager.py:281:
UserWarning: Matplotlib is building the font cache using fc-list. This may
take a moment.
'Matplotlib is building the font cache using fc-list. '
Thank to Emmanuel!
Le samedi 11 janvier 2020 11:49:08 UTC+1, Jean-François Ingenbleek a écrit :
>
> Hi,
>
> I just installed version 9 of Sagemath including version 3 of the Python
> kernel.
>
> Does Sagemath contain its own version of Python3 so that it is possible to
Hi,
I just installed version 9 of Sagemath including version 3 of the Python
kernel.
Does Sagemath contain its own version of Python3 so that it is possible to
uninstall another standalone version of Python3?
Big thanks to everyone.
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