(yet?). It would require work to
> get a better implementation specific for QQ['t']. This could be worthwhile
> to do well. Summer of Code?
>
>
> On Thursday 14 December 2023 at 04:05:47 UTC+13 Enrique Artal wrote:
>
>> It is over the ring of polynomials in one var
It is over the ring of polynomials in one variable over Q.
El miércoles, 13 de diciembre de 2023 a las 15:05:00 UTC+1, Dima Pasechnik
escribió:
> On Wed, Dec 13, 2023 at 10:55 AM Enrique Artal
> wrote:
> >
> > I have the toy example belowto compare the direct use of smi
I have the toy example belowto compare the direct use of smith_form and
the combination of hermite_form and smith_form.
Last execution (there are random inputs) gave:
CPU times: user 2.22 s, sys: 5.93 ms, total: 2.23 s Wall time: 2.23 s CPU
times: user 454 ms, sys: 990 µs, total: 455 ms Wall ti
I am running sage in Fedora 33, x86_64 sage 9.3beta4 (though the bug
appears also in ubuntu sage 9.1). This is a toy example:
K=GF(2)
V=K^2
B=V.basis()
B1=[vector(K,[i,j]) for i,j in [(1,0),(1,1)]]
V1=V.subspace_with_basis(B1)
I considere a vector space V of dimension 2 over the field of two el
Thanks for the help to Alexander and Vincent. It works now (branch sage); I
have no excuses to avoid to add more comments to the notebook. Best,
Enrique.
El sábado, 2 de noviembre de 2019, 0:53:19 (UTC+1), Enrique Artal escribió:
>
> Yes:
> https://github.com/enr
gt; https://github.com/OpenDreamKit/demo-semigroup-representation-theory/blob/master/Dockerfile
>
>
> Hope it may help. Is your setup somewhere on GitHub?
>
> Best wishes
> Alex
>
> On Tuesday, October 29, 2019 at 12:13:34 PM UTC, Enrique Artal wrote:
>>
>> I w
ub.docker.com/u/sagemath/sagemath
>
> Vincent
>
> Le 30/10/2019 à 09:11, Enrique Artal a écrit :
> > Cher Vincent,
> >
> > I hope to add now enough additional info. I am using mybinder.org (I
> did
> > not find another address); my Dockerfile is adapted fro
the failed build. And if you know how to do that, you can open
> a trac ticket.
>
> Also, it would be nice to have docker images for Sage with most (if
> not all) optional packages installed.
>
> Vincent
>
> Le 29/10/2019 à 05:13, Enrique Artal a écrit :
> >
I want to make available some of my notebooks in binder. I found very
useful sage-binder-env but I ran into problems in a case where I needed an
optional package, namely gap_packages. As stated I installed make package
using the Dockerfile but the installation stops with an error in make
all-to
r^2*x^2*y^2 + r^2*y^4 - 2*r^2*x^2 + x^4 + 2*r^2*y^2 + 2*x^2*y^2 + y^4)^2
>
>
> Le 24/07/2019 à 13:31, Enrique Artal a écrit :
> > I have encountered a problem with factor in SR which can be avoided but
> it
> > shows a problem. If I run this code:
> >
> > va
I forgot to add, it worked in 8.1 version and it does not work since 8.4
(at least). Adding the option dontfactor=[some variable not involved in h]
it works but much slower.
El miércoles, 24 de julio de 2019, 13:31:08 (UTC+2), Enrique Artal escribió:
>
> I have encountered a problem with
I have encountered a problem with factor in SR which can be avoided but it
shows a problem. If I run this code:
var('t',domain='complex')
var('r,x,y',domain='real')
h= r^6+r^4*t^2 + 4*r^4*t*conjugate(t) + r^4*conjugate(t)^2 +
r^2*t^2*conjugate(t)^2 - r^2*t^2 - r^2*conjugate(t)^2 + t^2*conjugate
I agree, and I use them for personal use. We are trying to change sagenb to
jupyter in our servers for teaching but meanwhile we need sagenb.
El viernes, 29 de marzo de 2019, 0:28:47 (UTC+1), Dima Pasechnik escribió:
>
> On Thu, Mar 28, 2019 at 11:23 PM Enrique Artal > wrote:
&g
In chrome one can erase a cell of a sagenb worksheet, making it empty and
the backspace. It used to work in firefox but not any more (version 66 in
my case, but may be in prior versions also). Is there a simple workaround?
Best, Enrique.
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I'll do it, but anyway it is strange that the wrong result is not reproduce
using sage -maxima.
El martes, 19 de febrero de 2019, 1:34:21 (UTC+1), slelievre escribió:
>
> Mon 2019-02-18 18:55:56 UTC+1, Enrique Artal:
> >
> > The integral of functions like sqrt(a+b*sin(t)
The integral of functions like sqrt(a+b*sin(t)^2) for most values of a,b
produce wrong results in sage, using maxima algorithmI, but it is not the
case if one uses maxima interface. Is there a way to try to debug the
problem? Best, Enrique
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I would be happy to be helpful, at least testing.
El martes, 22 de enero de 2019, 20:03:29 (UTC+1), Nils Bruin escribió:
>
> See:
>
> https://trac.sagemath.org/ticket/27091
>
> Balanced summing (which you are basically doing) already makes a bit of a
> difference. If that's indeed the issue then
:09 (UTC+1), Nils Bruin escribió:
>
> On Thursday, January 17, 2019 at 3:37:36 PM UTC-8, Enrique Artal wrote:
>>
>> I made some computations, I skip the details for now, but the result was
>> a rational function with rational coefficients and 13 indeterminates. The
>>
file, but I wonder which is the best strategy to save a heavy result and
being able to load it using less time than the actual computation.
Ideas would be appreciated. Thanks, Enrique Artal.
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If I am not wrong it works from a terminal and also if one uses either sage
-m jupyter or sage -n jupyterlab.
It is possible to use it directly from jupyter or jupyter lab if the
sagemath kernel is availabe to jupyter, e.g. at
/usr/local/share/jupyter/kernels or .local/share/jupyter/kernels, an
If I am not wrong it works from a terminal and also if one uses either sage
-m jupyter or sage -n jupyterlab.
It is possible to use it directly from jupyter or jupyter lab if the
sagemath kernel is availabe to jupyter, e.g. at
/usr/local/share/jupyter/kernels or .local/share/jupyter/kernels, an
2 + 1) + 1)/(u^4 + u^2), (2*u^2 + 1)/(u^2 +
1)^(3/2)),
(-(2*u^2 + (2*u^2 + 1)*sqrt(u^2 + 1) + 1)/(u^4 + u^2), (2*u^2 + 1)/(u^2 +
1)^(3/2))]
False
#Check if they are eigenvalues for the left action
[(j*dN-i*j).simplify_full() for i,j in U]
Output:
[(0, 0), (0, 0)]
True
Best, Enrique Artal.
-
Thanks to you for your work!
El lunes, 13 de noviembre de 2017, 15:06:13 (UTC+1), Ralf Stephan escribió:
>
> On Sunday, November 12, 2017 at 11:30:51 AM UTC+1, Enrique Artal wrote:
>>
>> It seems that fresnels is defined in sympy but not in sagemath, Is it
>> possible
ve the command that leads you to the error.
>
> Concerning sympy, note that you can use it directly within Sage
>
> sage: import sympy
> sage: x = sympy.Symbol('x')
> sage: sympy.integrate(sympy.sin(x^2), x)
> 3*sqrt(2)*sqrt(pi)*fresnels(sqrt(2)*x/sqrt(pi))*ga
ve the command that leads you to the error.
>
> Concerning sympy, note that you can use it directly within Sage
>
> sage: import sympy
> sage: x = sympy.Symbol('x')
> sage: sympy.integrate(sympy.sin(x^2), x)
> 3*sqrt(2)*sqrt(pi)*fresnels(sqrt(2)*x/sqrt(pi))*ga
I was prepairing some exercises and I got some errors using differente
algorithms for integral, using version 8.0. Integrating with
mathematica_free, I got this error:
Traceback (most recent call last):
File "", line 1, in
File "_sage_input_4.py", line 10, in
exec compile(u'open("___cod
Dear all,
plot3d with threejs worked in 7.6 but it does not work in 8.0. Has anyone
seen it? Enrique
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Similar issue in fedora 26; sage -i -f openblas solved it
El martes, 11 de julio de 2017, 14:58:54 (UTC+2), Kathlén Kohn escribió:
>
> I just installed sagemath 7.6-8 using pacman and it crashes right away.
> The crash report is attached.
>
> It says "libgfortran.so.3: cannot open shared object f
17 at 2:59:39 PM UTC+1, Enrique Artal wrote:
>>
>> I have just updated my personal computer to fedora 26 and sagemath
>> crashed. The problem is that libgfortran.so.3 does not exist any more
>> (version 4); finally it worked forcing the reinstallation of openblas (sage
&g
I have just updated my personal computer to fedora 26 and sagemath crashed.
The problem is that libgfortran.so.3 does not exist any more (version 4);
finally it worked forcing the reinstallation of openblas (sage -i -f
openblas). I do not know if there is an easiest work to solve the issue.
--
Is there any particular change to test?
El miércoles, 10 de mayo de 2017, 16:12:26 (UTC+2), Dima Pasechnik escribió:
>
> Please test https://github.com/sagemath/sagenb/tree/1.0.rc0 (copy of the
> current master) before I go ahead with making a new Sage package. It works
> for me following the i
I have defined a ParametrizedSurface3D , named S. The output of show(S)
gives the parametrization of S, while the output of S is:
) failed: TypeError: not all arguments converted during
string formatting>
The output of print S is:
TypeError Traceback (most recent
the template will generally require reinstallation, but
> this happens to be a simple fix.
>
>
> On Monday, February 13, 2017 at 9:45:50 AM UTC-8, Enrique Artal wrote:
>>
>> I inspected the page in the browser and it complained about insecure
>> script i
I inspected the page in the browser and it complained about insecure script
in
'http://rawgit.com/mrdoob/three.js/r80/examples/js/controls/OrbitControls.js'
not in https
El lunes, 13 de febrero de 2017, 18:38:15 (UTC+1), Enrique Artal escribió:
>
> I have installed sag
I have installed sage 7.5 in several machines. When threejs works, it is
quite awesome but I found several issues:
- It does not work with ubuntu 16.04: no error, but no plot
- In fedora 25 it works with both sagenb and jupyter
- in fedora 25 it does not work if I use it using a personal
The final debugging process (IPhyton5.0 seems to be responsible) is
described in sage-devel group
El sábado, 4 de febrero de 2017, 23:07:43 (UTC+1), Enrique Artal escribió:
>
> I was wrong, but now I am quite sure that the issue seems to appear in
> sage-7.4.beta0.
>
> El
I was wrong, but now I am quite sure that the issue seems to appear in
sage-7.4.beta0.
El miércoles, 1 de febrero de 2017, 23:27:35 (UTC+1), Enrique Artal
escribió:
>
> If I am not wrong the problem is created in sage-7.3.beta3. I can try with
> the different patches beta2->beta3
If I am not wrong the problem is created in sage-7.3.beta3. I can try with
the different patches beta2->beta3. Can anyone guess a good order to do
that?
El sábado, 14 de enero de 2017, 19:18:32 (UTC+1), Enrique Artal escribió:
>
> I have installed 7.3, 7.4 and 7.5 and we use several
escribió:
>
> On 01/14/2017 03:42 AM, Enrique Artal wrote:
> > This is true. The problem is that if not used, simple expressions keep
> to
> > be too much complicated. Is there any compromise?
> >
>
> There is simplify_full() which should be safe for all
I have installed 7.3, 7.4 and 7.5 and we use several instances of sagenb
(it is for teaching and we use different addresses for different studies).
With 7.3, if a user reaches the limit of CPU time, his worksheet stops and
all the data in memory is lost, but quitting and opening the worksheet
a
This is true. The problem is that if not used, simple expressions keep to
be too much complicated. Is there any compromise?
El viernes, 13 de enero de 2017, 21:08:16 (UTC+1), Michael Orlitzky
escribió:
>
> On 01/13/2017 05:12 AM, Enrique Artal wrote:
> > I would like to know how to
sagenb
El viernes, 13 de enero de 2017, 19:34:15 (UTC+1), Dima Pasechnik escribió:
>
>
>
> On Friday, January 13, 2017 at 5:30:04 PM UTC, Enrique Artal wrote:
>>
>> Putting limits in /etc/security/limits.conf (or in files in limits.d)
>> works right up to Sage 7.3
reuse the notebook. With 7.4 and 7.5, when the limit is reached the
notebook becomes unusable and the only possibility to work is to kill and
restart it. Some change between 7.3 and 7.4 may cause it.
El domingo, 27 de noviembre de 2016, 21:55:06 (UTC+1), Enrique Artal
escribió:
>
> It seems t
I would like to know how to handle with this issue. Consider a function
f=sqrt(cos(x)^3 - 3*cos(x)^2 - cos(x) + 6). It is possible to deal with
this function for standard procedures like numerical_integral in (-1,1). If
one considers f.canonicalize_radical() it is presented as sqrt(cos(x)^2 -
c
Thanks!
El domingo, 25 de diciembre de 2016, 0:40:43 (UTC+1), Dima Pasechnik
escribió:
>
>
>
> On Saturday, December 24, 2016 at 11:20:32 PM UTC, Dima Pasechnik wrote:
>>
>>
>>
>> On Saturday, December 24, 2016 at 3:38:43 PM UTC, Enrique Artal wrote:
>>
I need to use a gap package which is not installed by sage, namely nq. I
have been able to install it using wiki instructions and I can use it in a
gap session inside sage: e.g.,
LowerCentralFactors(FreeGroup(1),1);
after the package has been loaded. In a sage session the following code
works
Sunday, November 27, 2016 at 3:04:48 AM UTC-8, Enrique Artal wrote:
>>
>> Thanks, As you say, it would be better something more direct, but your
>> approach is a strong improvement for my needs.
>> By the way, I changed in our experimental notebook 7.4 -> 7.3 and t
de noviembre de 2016, 6:07:05 (UTC+1), jori.ma...@uta.fi
escribió:
>
> On Sat, 26 Nov 2016, Enrique Artal wrote:
>
> > By the way, using server_pool, is there a way to know which user of the
> > notebook is using a user of the server_pool?
>
> AFAIK not really. I can list f
I think the problem was not in Singular but in the Sage code for division
of polynomials. There is a ticket, https://trac.sagemath.org/ticket/17638.
I may help but my skills are not enough to solve the problem.
El martes, 22 de noviembre de 2016, 19:18:07 (UTC+1), Justin C. Walker
escribió:
>
>
By the way, using server_pool, is there a way to know which user of the
notebook is using a user of the server_pool?
El sábado, 26 de noviembre de 2016, 11:50:12 (UTC+1), Enrique Artal
escribió:
>
> I forgot to mention we use server_pool (there is one master-server and the
> ssh co
to
the computer and the only option is turn off and on; if we put, we do not
loose access, but the notebook is stopped too soon.
Enrique.
El sábado, 26 de noviembre de 2016, 2:49:09 (UTC+1), Nils Bruin escribió:
>
> On Friday, November 25, 2016 at 2:24:49 PM UTC-8, Enrique Artal wrote:
>&
gy to avoid this? The systems run Ubuntu 16.04 and
Sagemath 7.3
Thanks, Enrique Artal.
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This is an old bug affecting polynomials with local or semilocal orders.
The problem is that at some point, the definition of the division by a
polynomial checks first if the polynomial is a unit and in that case it
identifies it with the constant term. This works for global orderings, but
it c
Hello,
I have encountered a problem if we work with the fraction field of a
polynomial ring with a local ordering. The following code is done in 6.4:
sage: R2.=PolynomialRing(QQ,order='lex')
sage: g=1+x
sage: 1/g
1/(x + 1)
sage: (1/g).parent()
Fraction Field of Multivariate Polynomial Ring in x,
King wrote:
> Hi Dmitrii and Enrique,
>
> On 16 Jun., 17:17, Dima Pasechnik wrote:
>
> > On 16-Jun-2011, at 3:28 PM, Enrique Artal Bartolo wrote:
>
> > > Dear Dimitri,
> > > I am not sure if your are the good correspondant for this mail. I am a
> > >
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