[sage-support] Docker version of Sagemath

[Cyrille Piatecki]

The docker version of Sagemath poses some unexpected problems. It works but 
it is a little cryptic for dummies who want use Sagemath and not in 
installation of SageMath.

For instance, with the precedent way to install there was no probem for pdf 
latex and even if with the console it was possible to install a missing 
package. Right now, if a package is not installed I do not know how to do.

Is there somebody who can clearly explain how to manage this or to propose 
and extended container.  

Thanks all for your formidable work

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[sage-support] substitution in list

[cyrille piatecki]

First I have seen that perhaps my question has an answer in AskSagemath but 
currently it doesn't answer.

Suppose I have a list of variables x_1, x_2, x_3,...x_n

I have some sub-list of variables say [x_4, x_1, x_6...]. But whenever x_4, 
x_5,x_6 belong to this list I want the substitution x_4 ->epsilon_0, x_5 -> 
epsilon_1... (this is an only an example. Is there a way to do this in the 
same way that we have a substitution in a fonction in Sagemath?  

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[sage-support] LatexExpr

[cyrille piatecki]

I often use LatexExpr(r'\text{blabla} x_i =') encapsulated in show(). It's 
very easy to use
but not if I need  one cote as in "it's". Is there a way to escape the cote 
?

Thanks

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[sage-support] Constrained optimization with strange result.

[cyrille piatecki]

On my computer the solution of

var('a x y p_x p_y D Rev R l')
assume(a,'real')
assume(x,'real')
assume(y,'real')
assume(p_x,'real')
assume(p_y,'real')
assume(D,'real')
assume(Rev,'real')
assume(R,'real')
assume(l,'real')
assume(a<1)
assume(a>0)
assume(p_x>0)
assume(p_y>0)
assume(R>0)
U =(1/(a+1))*x^(a+1)+y
show(LatexExpr(r'\text{La fonction d}^\prime\text{utilité est }U(x,y) = 
'),U)
D= x*p_x + y*p_y
show(LatexExpr(r'\text{La Dépense } D = '),D)
Rev= R
show(LatexExpr(r'\text{Le Revenu } Rev = '),R)
L=U+l*(Rev-D)
show(LatexExpr(r'\text{Le lagrangien est } \mathcal{L}(x, y, λ) = '),L)
FOC = [diff(L,x),diff(L,y),diff(L,l)]
show(LatexExpr(r'\text{Les condition du premier ordre sont } 
\left\{\begin{array}{c}\mathcal{L}_x= 0\\\mathcal{L}_y= 0\\\mathcal{L}_λ= 
0\end{array}\right. '))
show(LatexExpr(r'\text{soit }'))
show(LatexExpr(r'\mathcal{L}_x= 0 \Longleftrightarrow '),FOC[0]==0)
show(LatexExpr(r'\mathcal{L}_y= 0 \Longleftrightarrow '),FOC[1]==0)
show(LatexExpr(r'\mathcal{L}_λ= 0 \Longleftrightarrow '),FOC[2]==0)
sol=solve([FOC[0]==0,FOC[1]==0,FOC[2]==0],x,y,l)
show(sol)

Is nearly correct, but an extra complex exponential term multiplies $x$ and 
then modifies $y$. Even as an element I do not understand its form :

$e^{(2iπz_{5797}a)}$

Could some one explain why ?

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[sage-support] Re: Matrix multiplication by symbolic vector

[cyrille piatecki]

OK, one more time I feel stupid and one more time thanks to answer. But now 
look at this

R = PolynomialRing(RR, 'c', 20)
c = R.gens()
c=vector([c[i] for i in (0..2)])
Z1=matrix([[1, 2],[3,4]])*vector([c[1],c[2]])
show(Z1)<--- correct display
But c and c[1] is not recognized. So I do not know how to call the c's.
solve(Z1[0]==0,c)

solve(Z1[0]==0,c[1])


On Sunday, June 6, 2021 at 12:14:15 PM UTC+2 slelievre wrote:

> 2021-06-06 10:47:24 UTC+2, Cyrille Piatecki:
> >
> > [c[i] for i in range(0..2)] <-- this doesn't work
>
> You are mixing two different options:
>
> - range:
>   [c[i] for i in range(2)]
>   [c[i] for i in range(0, 2)]
>
> - ellipsis:
>   [c[i] for i in (0 .. 2)]
>
>

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[sage-support] Matrix multiplication by symbolic vector

[cyrille piatecki]

Hello, usually I ask question by Ask sagemath but the server seems down 
since yesterday.

I would like to define a matrix function with symbolic variables (Linear or 
quadratic) of the form x A x,   B x...  and also linear inequalities of the 
form C x <= b for any size of the A, B and C matrix. The final problem is 
to optimize or to manipulate equations or inequations.

Whichever be my fails effort, and my reading comfort me, it seems not to be 
allowed in Sagemath which seems strange. But a recent reading seems to say 
that 

R = PolynomialRing(RR, 'c', 20)
c = R.gens()

could solve my problem. In fact, if I define a list of c[i]

show([c[0],c[1],c[2]]) <-- this work
[c[i] for i in range(0..2)] <-- this doesn't work

I need to understand

Thanks




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[sage-support] packages

[Cyrille Piatecki]

There are some distinction between Sagecell and Sagemath notebooks. For 
instance the option "simpy" of "solve" does not work with Sagecel. Why ? I 
have also observe that under Lin ux the current version is Sagemath 9.2. Is 
it the current Sagecell version (I dont think so) ? Under Windows we are 
stiked to 9.1 (until now)

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[sage-support] SageCell

[Cyrille Piatecki]

Sagecell is a wonderfull net ressources for those pandemic time. I wonder 
how to center the graphical ouput. 

Thanks

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[sage-support] Sage cells

[Cyrille Piatecki]

I would be pleased to have more information on sagemath cells. I do not 
know to whom ask the question.


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Re: [sage-support] Absolute beginner. I just downloaded 9.1 to my PC

[Cyrille Piatecki]

For a beginner you need only Notebook server. If you run this you will 
arrive on jupiter where oyou will be able to define a new notebook.


Le 20/09/2020 à 22:13, 'Toby Mathews' via sage-support a écrit :
I see the three cmd windows Notebook Server, Shell and Console. After 
looking at some dated tutorials on YouTube I am unable to navigate so 
that I can see the GUI's.  It there a more recent tutorial?  What is 
the best way to figure this out? --
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.


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[sage-support] Sage cells

[Cyrille Piatecki]

Dear All,

I would like to know is there is a way to centerr results in SageCells. 
Also when we have acces several times in an html page to sagecells is 
there a way to ask toi remember the results of a previous acces ?


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Re: [sage-support] Sage could not find a kernel under Windows10

[Cyrille Piatecki]

As I have no answer I try again to reinstall all my distribution and things 
get wrongest with a bash error 126

Le vendredi 10 juillet 2020 à 15:02:45 UTC+2, Cyrille Piatecki a écrit :

> I suppose but I am not sure that it is a consequence of a windows up date 
> I have tried. Malwarebyte detect nothing bad.
>
> Le vendredi 10 juillet 2020 à 12:02:53 UTC+2, Cyrille Piatecki a écrit :
>
>> May be a windows update. I have reinstalled the last versions of Python 
>> and Sage but the system seems to be confused and doesn't find the necessary 
>> dlls
>>
>> Le vendredi 10 juillet 2020 à 08:19:59 UTC+2, dim...@gmail.com a écrit :
>>
>>>
>>>
>>> On Fri, 10 Jul 2020, 07:15 Cyrille Piatecki,  
>>> wrote:
>>>
>>>>
>>>> Since yesterday, I have the following problem : my notebooks cannot be 
>>>> connected to Sage. I have completely erased Sage and Python of my computer 
>>>> and then reinstalled them. So I work, under Windows 10, with the last 
>>>> version of both of it. For a short moment it seems to work but the the 
>>>> problem reappears. Has any body experimented such a weird comportment 
>>>> which 
>>>> may be due to windows ?
>>>>
>>>> Here is an image of the error prompted by the notebook Server
>>>>
>>>> [image: sage.png]
>>>>
>>>>
>>>> So Http 404 is not founded. What can I do ?
>>>>
>>>
>>> Are you saying it stopped working "by itself", i.e. as a result of a 
>>> Windows update or something like that?
>>>
>>>
>>> -- 
>>>> You received this message because you are subscribed to the Google 
>>>> Groups "sage-support" group.
>>>> To unsubscribe from this group and stop receiving emails from it, send 
>>>> an email to sage-support...@googlegroups.com.
>>>> To view this discussion on the web visit 
>>>> https://groups.google.com/d/msgid/sage-support/a2cf2b9b-4d70-4efe-8565-b34c15026fe1n%40googlegroups.com
>>>>  
>>>> <https://groups.google.com/d/msgid/sage-support/a2cf2b9b-4d70-4efe-8565-b34c15026fe1n%40googlegroups.com?utm_medium=email&utm_source=footer>
>>>> .
>>>>
>>>

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Re: [sage-support] Sage could not find a kernel under Windows10

[Cyrille Piatecki]

I suppose but I am not sure that it is a consequence of a windows up date I 
have tried. Malwarebyte detect nothing bad.

Le vendredi 10 juillet 2020 à 12:02:53 UTC+2, Cyrille Piatecki a écrit :

> May be a windows update. I have reinstalled the last versions of Python 
> and Sage but the system seems to be confused and doesn't find the necessary 
> dlls
>
> Le vendredi 10 juillet 2020 à 08:19:59 UTC+2, dim...@gmail.com a écrit :
>
>>
>>
>> On Fri, 10 Jul 2020, 07:15 Cyrille Piatecki,  
>> wrote:
>>
>>>
>>> Since yesterday, I have the following problem : my notebooks cannot be 
>>> connected to Sage. I have completely erased Sage and Python of my computer 
>>> and then reinstalled them. So I work, under Windows 10, with the last 
>>> version of both of it. For a short moment it seems to work but the the 
>>> problem reappears. Has any body experimented such a weird comportment which 
>>> may be due to windows ?
>>>
>>> Here is an image of the error prompted by the notebook Server
>>>
>>> [image: sage.png]
>>>
>>>
>>> So Http 404 is not founded. What can I do ?
>>>
>>
>> Are you saying it stopped working "by itself", i.e. as a result of a 
>> Windows update or something like that?
>>
>>
>> -- 
>>> You received this message because you are subscribed to the Google 
>>> Groups "sage-support" group.
>>> To unsubscribe from this group and stop receiving emails from it, send 
>>> an email to sage-support...@googlegroups.com.
>>> To view this discussion on the web visit 
>>> https://groups.google.com/d/msgid/sage-support/a2cf2b9b-4d70-4efe-8565-b34c15026fe1n%40googlegroups.com
>>>  
>>> <https://groups.google.com/d/msgid/sage-support/a2cf2b9b-4d70-4efe-8565-b34c15026fe1n%40googlegroups.com?utm_medium=email&utm_source=footer>
>>> .
>>>
>>

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Re: [sage-support] Sage could not find a kernel under Windows10

[Cyrille Piatecki]

May be a windows update. I have reinstalled the last versions of Python and 
Sage but the system seems to be confused and doesn't find the necessary dlls

Le vendredi 10 juillet 2020 à 08:19:59 UTC+2, dim...@gmail.com a écrit :

>
>
> On Fri, 10 Jul 2020, 07:15 Cyrille Piatecki,  wrote:
>
>>
>> Since yesterday, I have the following problem : my notebooks cannot be 
>> connected to Sage. I have completely erased Sage and Python of my computer 
>> and then reinstalled them. So I work, under Windows 10, with the last 
>> version of both of it. For a short moment it seems to work but the the 
>> problem reappears. Has any body experimented such a weird comportment which 
>> may be due to windows ?
>>
>> Here is an image of the error prompted by the notebook Server
>>
>> [image: sage.png]
>>
>>
>> So Http 404 is not founded. What can I do ?
>>
>
> Are you saying it stopped working "by itself", i.e. as a result of a 
> Windows update or something like that?
>
>
> -- 
>> You received this message because you are subscribed to the Google Groups 
>> "sage-support" group.
>> To unsubscribe from this group and stop receiving emails from it, send an 
>> email to sage-support...@googlegroups.com.
>> To view this discussion on the web visit 
>> https://groups.google.com/d/msgid/sage-support/a2cf2b9b-4d70-4efe-8565-b34c15026fe1n%40googlegroups.com
>>  
>> <https://groups.google.com/d/msgid/sage-support/a2cf2b9b-4d70-4efe-8565-b34c15026fe1n%40googlegroups.com?utm_medium=email&utm_source=footer>
>> .
>>
>

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[sage-support] Sage could not find a kernel under Windows10

[Cyrille Piatecki]

Since yesterday, I have the following problem : my notebooks cannot be 
connected to Sage. I have completely erased Sage and Python of my computer 
and then reinstalled them. So I work, under Windows 10, with the last 
version of both of it. For a short moment it seems to work but the the 
problem reappears. Has any body experimented such a weird comportment which 
may be due to windows ?

Here is an image of the error prompted by the notebook Server

[image: sage.png]


So Http 404 is not founded. What can I do ?

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[sage-support] Loading a sage worksheet inside a notebook

[Cyrille Piatecki]

Hello,

dispite all my effort under windows 10, I am not able to load any 
notebook inside a current notebook with the command load(). I hav tried 
"c://..." c:/..." "c:\\...". From this I cannot explain to sage that 
Gurobi is on my computer. What can I do ?


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[sage-support] failling to display in LaTeX

[Cyrille Piatecki]

Please have a look to this sequence

%display latex
A = (
[1, 3, 1],
[-1, 0, 1],
[2, -1, 2],
[2, 3, -1],

)
b = (3, 2, 4, 2)
c = (5, 4, 2)
P = InteractiveLPProblem(A, b, c,variable_type=(">=",">=",">="))
P <-*P is displayed in LaTeX*

P=P.standard_form()

D=P.initial_dictionary()
D <-*D is displayed in LaTeX*

D.is_feasible()*
*

*True *<-**displayed in LaTeX**

D.enter("x1")
D <- *from now on only LaTeX code*

It seem to be a weird comportment since this is by no way difficult to 
display.


Thanks

Cyrille Piatecki


**
**

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[sage-support] 3D display

[Cyrille Piatecki]

Hello,

those command

 x,y=var('x,y')
spherical_plot3d(1+sin(5*x)/5,(x,0,2*pi),(y,0,pi),rgbcolor=(1,0.5,0),plot_points=(80,80),opacity=0.7)

are not displayed on a windows installation either in console mode or in 
notebook. I am aware of the problem with Jupyter, but not with the 
console mode, what can I do ?


Cyrille Piatecki

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Re: [sage-support] Re: keyboard

[cyrille piatecki]

Dear Eric,

I have tried the solution and it seems to work in console mode, but note 
in a browser. Secondly as mathematica under windows open only in browser 
mode, it was not evident to find how to change for the console screen


Cordialy

Cyrille Piatecki
Le 26/03/2014 13:28, Eric Gourgoulhon a écrit :

Hi,

Le samedi 25 janvier 2014 19:23:04 UTC+1, cyrille piatecki a écrit :

 A very simple question needing a very simple answer for a
beginner ---
I suppose the question has been asked a lot of time --- : how
toset the
keyboard  --- in my case french --- in Sage under Windows an VMware.


This is explained here:
http://wiki.sagemath.org/SageAppliance#Changing_the_keyboard_layout

Best wishes,

Eric.
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[sage-support] keyboard

[cyrille piatecki]

 A very simple question needing a very simple answer for a beginner --- 
I suppose the question has been asked a lot of time --- : how toset the 
keyboard  --- in my case french --- in Sage under Windows an VMware.


Thanks

Cyrille Piatecki

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Re: [sage-support] Re: windows installation 3

[Cyrille Piatecki]

Quoting emil :

Dear Emil,
first of all, I leave for the end of the week tomorrow so if you  
answer this message, don't be astonished if I do not react.


Yesterday, it was impossible to download from the swiss domain so I went on

 http://boxen.math.washington.edu/home/emil/doc/html/en/

But as I am writting this lines I tryed to go on the swiss domain and  
today it works --- yesterday it do not accepted the username/password  
association.


I have verifyed the checksum it's perfect. But unfortunately windows  
continue to says that it is not a valid windows program.


It seems that I could work with the iso file, but unfortunately as I  
am a new commer to vmware, I don't know how to setup the mouse and  
then I could nopt type set any command because I have not been able to  
setup my keyboard.


An other problem is that I don't know how to change the size of the  
virtual machine.

I am going to test the cd

Just before closing. I think Sage work from the iso file but it's so  
slow that I think I will be waiting if ever there will be a cygwin  
version.


Cordialy

Cyrille





On 27 Dez., 09:56, Cyrille Piatecki 
wrote:

Quoting emil :

Dear Emil,

I will check your comments this afternoon.

Our comments crossed in the Aether ...
Butr I must say that  

yesterday I have follow your advise and tryed the pupy way. So I have  
dowloaded the Iso and the exe file.

Which download place did you use?


After more than two hours, it was  
too late to try to use the exe but I was able to transfert the iso on  
a cd.

You downloaded from France?



Early this morning, I have tryed to use the exe file but it tels me  
that's not a windows file --- perhaps a loading problem.

You can check the integrity of the download by comparing the md5
checksum. The command is
md5sum filename. The md5sums of the downloads should be in the
download-directories.

And the cd  

doesn't boot


How did you burn the iso to CD?
You have to burn the iso as iso (then it will be able to boot). If you
burn the iso as normal data then it will not work ...



Some times all goes wrong.


In my experience there is a learning curve in everything and lot of
things can go wrong. If you have done it 10 times then its easy, but
the first time is
often painfull (but it shouldn't necessarily be that way imo).

Did you follow my brief instructions on   
http://boxen.math.washington.edu/home/emil/doc/html/en

?
I try to give a working Howto, but of course there is much space for
improvements.
If you have any comments or suggestions on it I'll try to use it.



I have also an other question Is there a procedure to load an iso file  
directly on vmware or any other virtualiser.

IF you have a bootable iso file you can use any virtualisation
software to run it.
I ran the isofile of sagelive in vmware, virtualbox and Qemu.

VMplayer:
In principle you have to say: create new VM. then choose that virtual
CD is set to the isofile.
Choose 512 MB Ram (instead of default 256) in VM settings. If you just
want then harddisk settings don't matter.
Then you can test the iso in the VM (thats what I do when creating iso
files)

However producing a well working virtual machine image like the
official one is a bit tricky and more involved.
I am currently trying to make such an image from my iso, but I won't
finish it during christmas holidays.



Thanks

Cyrille



I will try to make a download from the given locations from the exe
file and the iso in the evening (no time now - skiing with the kids),
could you please send me your computer specs (OS version (XP,
Vista, /-32 or 7-64, RAM). Then I can post a detailled howto.



> On 26 Dez., 10:57, emil  wrote:
>> Hello Cyrille,

>> sage-vmware.vmdsk is the virtual harddisk file. I have done a
>> installation of the virtual machine recently but I cant recall having
>> that troubles.
>> I will check my install and look where I find this harddisk file and
>> be back later.

> OK,

> I downloaded sage-vmware to desktop and extracted it there.

> The following is extracted from the README.txt with my comments:

> ...

> Installation
> 

> Installing Sage should take 15 to 20 minutes, less than 2 GB of hard
> drive
> space, and be painless.

> 1. Download sage-vmware-x.y.zip
> --> was sage-vmware-4.6.zip

> 2. Extract it anywhere you want. This will take about 15 minutes
> despite
>    anything Windows tells you.  Do *not* stop the extract halfway
> through
>    and think Sage will still work.)
> --> was faster (maybe 5 min) on my laptop

> 3. Make sure you have installed the free VMware program. See the
> following
>    URL for more information:http://www.vmware.com/products/player/
> -->I have VMplayer 3.1.3 installed

> 4. Double click on sage_vmx in the sage-vmware-x.y directory to run
> Sage.
> --> IMPORTANT: Filename is

Re: [sage-support] Re: windows installation 3

[Cyrille Piatecki]

Quoting emil :

Dear Emil,

I will check your comments this afternoon. Butr I must say that  
yesterday I have follow your advise and tryed the pupy way. So I have  
dowloaded the Iso and the exe file. After more than two hours, it was  
too late to try to use the exe but I was able to transfert the iso on  
a cd.


Early this morning, I have tryed to use the exe file but it tels me  
that's not a windows file --- perhaps a loading problem. And the cd  
doesn't boot


Some times all goes wrong.

I have also an other question Is there a procedure to load an iso file  
directly on vmware or any other virtualiser.


Thanks

Cyrille




On 26 Dez., 10:57, emil  wrote:

Hello Cyrille,

sage-vmware.vmdsk is the virtual harddisk file. I have done a
installation of the virtual machine recently but I cant recall having
that troubles.
I will check my install and look where I find this harddisk file and
be back later.


OK,

I downloaded sage-vmware to desktop and extracted it there.

The following is extracted from the README.txt with my comments:

...

Installation


Installing Sage should take 15 to 20 minutes, less than 2 GB of hard
drive
space, and be painless.

1. Download sage-vmware-x.y.zip
--> was sage-vmware-4.6.zip

2. Extract it anywhere you want. This will take about 15 minutes
despite
   anything Windows tells you.  Do *not* stop the extract halfway
through
   and think Sage will still work.)
--> was faster (maybe 5 min) on my laptop

3. Make sure you have installed the free VMware program. See the
following
   URL for more information: http://www.vmware.com/products/player/
-->I have VMplayer 3.1.3 installed

4. Double click on sage_vmx in the sage-vmware-x.y directory to run
Sage.
--> IMPORTANT: Filename is "sage-vmware" (sage-vmware.vmx) not
sage_vmx
-->The virtual disk file is also in the same folder, its name is sage-
vmware.vmdk.

Using Sage
==

1. When Sage starts up, click in the window (and possibly press
   Control-G on some computers), then type "notebook" at the prompt to
   start the Sage notebook server.
-> This is a change with the new versions. You have 3 Icons to start
Notebook, Sage on commandline or a terminal.
-> If you start sagenotebook,in the lower right cornerof the  vm a
window is shown with an IP adress. This is the IP adress to type in
the windows-browser (bookmark it?!)

2. Now you can use Sage via your web browser from Windows
   (it's best to use Firefox).
--> Had no problems with seamonkey and opera



May I also point you to the sage windows installer, which is kind of a
different approach:http://boxen.math.washington.edu/home/emil/doc/html/en/


Any feedback?


kind regards
emil

On 26 Dez., 06:59, Cyrille Piatecki 
wrote:



> So I have isntalled vmWare Player and double-clicked on  
> sage-vmware.vmx as is said in the tutorial but the answer is

> File not found: sage-vmware.vmdk

Since all necessary files should be present if you downloaded the
correct zip file, I just can think of a wrong setting in the VMplayer
configuration.

On the top of the VM-window check Virtual Machine/ Virtual Machine
settings/ Options (Tab) / Working directory (on right side)




> Thanks

> Cyrille


merry christmas

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Re: [sage-support] Re: windows installation 3

[Cyrille Piatecki]

Quoting emil :

Hello Emil,



Thank you to answer to my question on this xmas day. I have had a hard  
time to install sage  who seems to me an interesting alternative to  
Mathematica. I am downloading the recommanded files and I hope it will  
work.


Have a good evening

Cyrille

Hello Cyrille,

sage-vmware.vmdsk is the virtual harddisk file. I have done a
installation of the virtual machine recently but I cant recall having
that troubles.
I will check my install and look where I find this harddisk file and
be back later.

May I also point you to the sage windows installer, which is kind of a
different approach:
http://boxen.math.washington.edu/home/emil/doc/html/en/

kind regards
emil

On 26 Dez., 06:59, Cyrille Piatecki 
wrote:

So I have isntalled vmWare Player and double-clicked on  
sage-vmware.vmx as is said in the tutorial but the answer is

File not found: sage-vmware.vmdk

Thanks

Cyrille


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URL: http://www.sagemath.org





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[sage-support] windows installation 3

[Cyrille Piatecki]

So I have isntalled vmWare Player and double-clicked on  
sage-vmware.vmx as is said in the tutorial but the answer is


File not found: sage-vmware.vmdk

Thanks

Cyrille

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[sage-support] installation under windows

[Cyrille Piatecki]

In my last message, I was explaining my desapointment to the criptic  
aspect of Sage installation. Then I realized that the install  
instruction were for vmware not for virtual box.


Is there some one whi can help me

Thanks

Cyrille

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[sage-support] windows installation

[Cyrille Piatecki]

Hello,

I am a french newcommer on Sage and I work under windows --- nobody  
perfect. I find the install instructions very criptic. I have  
downloaded Oracle vm Virtualbox and the last version of sage. I read  
the instruction but nothing appears. Could you be more explicit on  
Sage installation for dummies.


Thanks

Cyrille

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