matrix lapack and blas are extremely well optimized,
- but it seems that, for sparse matrices, Sage uses the scipy
implementation which is written in python, and... this is really not
good for speed ! So what you say is true : a slow implementation and
slow data structures...
Yours,
Thierry
Le 07/04/2023 à 23:53, John H Palmieri a écrit :
Some recent versions of Singular don't seem to work with Sage. You could
try "make distclean" (to start over) and "./configure
--with-system-singular=no" to force Sage to build its own Singular. Then
"make".
Yes, I had the same problem on De
When doing numérical computations, you must use RDF floats, except for
very special purpose. RDF is your processor's float. The default Real
Field, based on MPFR (which by default as the same precision as RDF) is
slow as it is based on MPFR, a very good library, but MPFR is a software
based li
You should start by installing "build-essential" and gfortran. To do
this you have to do:
sudo apt update
sudo apt install build-essential gfortran
sudo is mandatory (rivileged (root) access).
build-essential contains gcc and g++ compilers as well as some libraries
and tools, but not the fort
Le 08/10/2018 à 12:56, Dima Pasechnik a écrit :
> On Mon, Oct 8, 2018 at 11:34 AM Thierry Dumont
> wrote:
>>
>> I do:
>>
>> N= 10^8
>> theta= RDF(2*pi/N)
>> phi=[i*theta for i in range(0,N)]
>>
>> not something sophisticated...!
>>
>
I do:
N= 10^8
theta= RDF(2*pi/N)
phi=[i*theta for i in range(0,N)]
not something sophisticated...!
Also: it is not a good idea do do that: better use numpy. BUT
looking at "top" during the computation of
phi=[i*theta for i in range(0,N)],
the memory used jumps to 3Gb and then grows, grows... un
Let's do this:
sage: R = PolynomialRing(AA,"x")
sage: x = R.gen()
sage: n=3
Then:
sage: chebyshev_T(n,x).parent()
Univariate Polynomial Ring in x over Algebraic Real Field
Ok. But:
sage: legendre_P(n,x).parent()
Symbolic Ring
why that ?
Yours,
t.
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Le 27/07/2018 à 01:11, rudolf ordoyne a écrit :
> my guess is that i'm unable to install sage since the most recent
> release of sage is for 16.04. after unpacking the .tar, running "sudo
> ./sage" gives "sudo: ./sage: command not found"
>
> has anyone else been using ubuntu 18.04?
>
Yes, withou
Many people like me like emacs but in the "new generation" of developers
many (some?) have switched to VisualStudio, which is now available on
Linux.
What about Sage and VisualStudio ? There is a python environment which
seems good:
https://www.visualstudio.com/vs/features/python/?rr=https%3A%2F%2
Hi,
I am doing some performances measurements with Sage/scipy.
It's matrix x matrix multiplication (not a very new benchmark).
It appears that, on the same computer Sage version 8.0 uses Openblas
with multithreading, but not Sage version 8.1.beta3:
-Example (4 core, broadwell, 3.4ghz. Pea
sha256sum of the commit is 2cb350173d08ac534485918f08bca849e4ac6126)
Ciao,
Thierry
On Wed, May 10, 2017 at 07:12:26AM -0700, Dima Pasechnik wrote:
>
>
> Please test https://github.com/sagemath/sagenb/tree/1.0.rc0 (copy of the
> current master) before I go ahead with making a new S
Le 31/01/2017 à 12:30, Jeroen Demeyer a écrit :
> On 2017-01-31 12:24, Thierry Dumont wrote:
>> I just git clone sage, then checkout origin/develop and make.
>> Then after some time, Python 3 is installed and compiled.
>
> Are you really sure about that? Did you set the SAG
Le 31/01/2017 à 11:49, Jeroen Demeyer a écrit :
> On 2017-01-31 09:42, Thierry Dumont wrote:
>> When trying to compile 7.6.beta1, which installed Python3, I got a
>> cython problem (cmp...):
>
> That's not news... Nobody ever said that Sage works with Python 3.
>
When trying to compile 7.6.beta1, which installed Python3, I got a
cython problem (cmp...):
[sagelib-7.6.beta1] [353/465] Cythonizing sage/rings/morphism.pyx
[sagelib-7.6.beta1]
[sagelib-7.6.beta1] Error compiling Cython file:
[sagelib-7.6.beta1]
---
Le 17/01/2017 à 00:09, Volker Braun a écrit :
> You can force a particular architecture with
>
> OPENBLAS_CONFIGURE="TARGET=PRESCOTT" make -p openblas
>
>
Yes! it works, thanks.
Otherwise there are solutions when the vitual machine is run by KVM/libvirt:
1) if you add
in the definit
I tried to install 7.5.1 from source on an Ubuntu 14.04 (yes, I have no
choice).
This fails when compiling openblas-0.2.19.p0, when building
libopenblas_banias-r0.2.19.a.
ar -ru ../libopenblas_banias-r0.2.19.a samax_k.o samin_k.o
.
.
ar: sgemm_kernel.o: No such file or directory.
In the
Le 13/01/2017 à 11:09, Dima Pasechnik a écrit :
> IMHO you should be able to finish build by (repeatedly) running make.
> (It would in the end give you working Sage, although make will report an
> error in the end)
>
> Just in case, coxeter3 installs in 7.5 just fine for me (on a gentoo
> linux bo
Today, I have tried to upgrade from 7.4 to 7.5 (git pull; make ...)
I have a problem with the optional package coxeter3 (it does not compile).
Before trying to solve this problem with coxeter, I would like to know
if there is a canonical way to remove coxeter3 from sage tree to finish
the build c
Le 08/11/2016 à 11:05, Vincent Delecroix a écrit :
> On 8 November 2016 at 10:17, Thierry Dumont
> wrote:
>> Le 08/11/2016 à 08:43, Vincent Delecroix a écrit :
>>> Concerning representation of algebraic numbers, it is printed as an
>>> exact rational if and on
Le 08/11/2016 à 08:43, Vincent Delecroix a écrit :
> Concerning representation of algebraic numbers, it is printed as an
> exact rational if and only if it is stored as an exact rational. It
> will be if the method exactify has been called on the underlying
> representation of the number. Here is a
Something strange (at least for me).
I am computing with polynomials in QQbar[z]. So I do:
sage: P.=QQbar[]
And I define 2 polynomials N and D. Coefficients of N and D are all
real, algebraic numbers (say like QQbar(sqrt(3))) and I consider the
rational fraction R=N/D
sage: R.parent()
Fraction
Le 01/09/2016 à 21:29, Pierre-Yves Bienvenu a écrit :
> Hi, I'm trying to use Sage 7.3 on Ubuntu. I've downloaded the archive,
> used archive manager to extract it and got a directory SageMath. Inside
> I double click the sage executable. The terminal opens and after a lot
> of lines starting with
Le 31/08/2016 à 00:19, Volker Braun a écrit :
> On Tuesday, August 30, 2016 at 11:03:39 PM UTC+2, leif wrote:
>
> 48 GB claimed by *every* Sage process here
>
>
> Its a tiny fraction of the 128TB address space. We are not talking about
> used RAM here.
>
> which is *total* (not free!) p
Le 30/08/2016 à 19:06, William Stein a écrit :
> On Tue, Aug 30, 2016 at 9:56 AM, Thierry Dumont
> wrote:
>> I have two computers, and sage installed on both:
>>
>> 1) Ubuntu 12.04 , sage-7.3 on an nfs mount,y
>>
>> 2) Ubuntu 16.04, sage-7.3 on a local system
I have two computers, and sage installed on both:
1) Ubuntu 12.04 , sage-7.3 on an nfs mount,y
2) Ubuntu 16.04, sage-7.3 on a local system, on a ssd.
With the first one, sage starts slowly (as could be expected!), and I
have time to look at sage starting with "top". And during the starting
phas
Le 20/08/2016 à 08:09, HG a écrit :
> I am testing jupyter lab, all my kernels are recognized except one : sage ?
> Is there a way to config it manually to be used in jupyterlab ?
> Regards
> Henri
>
THis is the first time I heard about jupyter lab ! (things evoluate very
fast...). But, in my "cla
It's possibly a stupid question, but is it possible to use the
singular_console() in a notebook?
When trying it, the answer is that singular_console() is unknown (in the
notebook).
Yours
t.
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Le 21/04/2016 19:35, Volker Braun a écrit :
Linking with gsl is a known problem for the binary, should be fixed in 7.2
Actually, using a compiled buymyself 7.2 version, I have no problem.
No other solution than compiling?
t.d.
On Thursday, April 21, 2016 at 6:12:35 PM UTC+2, tdumont wrote:
Hello,
On an Ubuntu 14-04 machine, I download a sage-7.1 binary version,
install... ok.
The installation of database_gap-4.7.9 fails:
sage -i database_gap-4.7.9
...
Installed trans database.
Installed tomlib database.
Traceback (most recent call last):
File "/home/sage/sage-7.1/src/bin/sage
(this test is part of my "human testsuite" for releasing Sage Debian Live).
Ciao and thanks for maintaining sagecell,
Thierry
On Sun, Apr 17, 2016 at 05:29:46PM -0700, Andrey Novoseltsev wrote:
> Hello and sorry for cross-posting, I'm trying to maximize visibility.
>
> Af
Le 30/03/2016 22:33, jmarcellopere...@ufpi.edu.br a écrit :
start = time.time()
x = np.linalg.solve(A,B)
end = time.time()
print(end - start)
I have tried this juste now; sage version is 7.0
I get :
1) first version:
CPU times: user 6.88 s, sys: 76 ms, total: 6.95 s
Wall time: 2.03 s
2
Message transféré
Sujet : Re: Strange behavior with RealField(n)
Date : Mon, 22 Feb 2016 10:17:30 +0100
De : paul zimmermann
Pour : Thierry Dumont
Copie à : nbr...@sfu.ca
[please forward to sage-support, I am not allowed to post there]
Thierry,
I can reproduce the
Le 21/02/2016 23:15, Nils Bruin a écrit :
On Sunday, February 21, 2016 at 10:10:10 AM UTC-8, tdumont wrote:
I have students who want to compute decimals of pi...so, what can we do
with RealField(n) ?
I make the following script (pi.sage):
for p in [2
Le 21/02/2016 20:40, John Cremona a écrit :
Try RealField(500).pi() and similar.
Yes, it works... but my small piece of code should also give correct
results...
thanks.
t.
On 21 Feb 2016 18:10, "Thierry Dumont" mailto:tdum...@math.univ-lyon1.fr>> wrote:
I have stud
I have students who want to compute decimals of pi...so, what can we do
with RealField(n) ?
I make the following script (pi.sage):
for p in [2..10]:
R=RealField(10^p)
pii=4*atan(R(1))
print p,R,pii
Then, using sage 7.0 or 7.1.beta4:
Le 30/01/2016 22:49, Paul van Gorsel a écrit :
First I ran a 64 bits Linux Mint Debian Edition, unfortunately the
installation of Sage failed. Than I installed a 32 bit version (Linux
Mint 17.3), the same thing happened.
This is my laptop: HP-ProBook-4520s
Linux pgo-HP-ProBook-4520s 3.19.0-32-g
Le 27/01/2016 16:42, Volker Braun a écrit :
On Tuesday, January 26, 2016 at 12:43:28 PM UTC-5, tdumont wrote:
For binary distributions, we can install it at any place we want, no?
What is the difference?
The binary is built with a long path and comes with a script that
search&replaces
Le 25/01/2016 15:37, Volker Braun a écrit :
The directory path has to match, if its different on server and client
then you have to compile it on the client (or mount on the server in the
same path first).
Ok it's working. But is it something new ?
For binary distributions, we can install it
Hello,
I have tried to switch from 6.10 to 7.0, but... I have some problems.
1) Let me fist explain the architecture of our client/server installation:
-We have a nfs server (Debian + Zfs) which export a directory
(/srv/local64) to a large number of clients (all Ubuntu 14.O4-LTS) but
with dif
This seems related to the problem I had when running sage under jupyter
hub, and also in jupyter (the later: launching jupyter, then sage
6.0beta1):
-some parts of the documentation (the documentation in the sage tree)
cannot be accessed (FAQs for example).
But now (since 6.0beta1?), jsmol is
Le 10/10/2015 22:32, Jeroen Demeyer a écrit :
On 2015-10-10 21:24, Emmanuel Charpentier wrote:
In [2]:
%display simple
solve(x^2+1==0,x,to_poly_solve="force")
Out[2]:
[]
Huh ?
Works for me...
In any case, it would be very unlikely that a Sage command actually
gives different output in the
Hi,
With a colleague well known here (N. T. from Orsay) we started to play
with Jupyterhub and Sage during a rainy social day of the congress of
the French Society for Applied Maths (SMAI).
Actually, building a Jupyterhub server is something easy, and running
Sage in it also. But there remain for
Le 01/07/2015 08:23, Ralf Stephan a écrit :
> On Tuesday, June 30, 2015 at 1:24:23 PM UTC+2, tdumont wrote:
>
> Why is xxc in Symbolic Ring and not in Algebraic Field?
> mxx and xxc are essentialy the same thing, no ?
>
> When you input sqrt(2) it is not clear which object you want,
> Sag
I have found something a bit strange for me:
sage: xx=QQ(2)
sage: xx.parent()
Rational Field
ok...
sage: xxc=xx.sqrt()
sage: xxc.parent()
Symbolic Ring
Why not, but now:
sage: M1=matrix(QQ,1,1,[2])
sage: M1.parent()
Full MatrixSpace of 1 by 1 dense matrices over Rational Field
sage: M1C=M
Le 08/05/2015 11:00, Vincent Delecroix a écrit :
On 08/05/15 10:52, Thierry Dumont wrote:
Le 08/05/2015 10:23, Vincent Delecroix a écrit :
Bonjour Thierry,
Could you post your matrices Prec, M, mfeEast? I am not able to
reproduce the problem with change_ring...
Vincent
Hello Vincent.
Yes
Le 08/05/2015 10:23, Vincent Delecroix a écrit :
Bonjour Thierry,
Could you post your matrices Prec, M, mfeEast? I am not able to
reproduce the problem with change_ring...
Vincent
Hello Vincent.
Yes,
I join a part of my code, which reproduces the problem...
Yours
t.
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Hello,
I have 2 matrices: Prec and M.
>sage: Prec.parent
Full MatrixSpace of 4 by 4 dense matrices over Rational Field
>sage: M.parent()
Full MatrixSpace of 4 by 4 dense matrices over Rational Field
>sage: Prec.is_symetric()
True
ok. I also know that Prec is positive. Then, I do:
>sage: LC=Pre
When compiling from source, I have a problem with GFX:
./gf2x/gf2x_mul3.h:69:19: warning: SSE vector return without SSE enabled
changes the ABI [-Wpsabi]
#define SHL(x, r) _mm_slli_epi64((x), (r))
^
./gf2x/gf2x_mul3.h:82:12: note: in expansion of macro 'SHL'
g[2] = SHL
I apologize for this question: I am sure I have seen the answer
somewhere, but I cannot find int..
I run some sage code: for example I solve a linear system with
coefficients in QQ, then an other one with coefficients in RDF.
I want to list which library (package) is used in both cases.
This
maintain a list of such accounts, once you get at least 10 true
karma points, i will remove the fake ones.
Ciao,
Thierry
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Le 22/04/2014 18:33, leif a écrit :
Volker Braun wrote:
On Tuesday, April 22, 2014 4:43:43 PM UTC+1, tdumont wrote:
I am in 6.1.1; as far as as know, I have built sage from source,
using
the system Atlas blasand I have just upgraded from Ubuntu
13.10 to
14.04. Could the problem
Dear all,
I have juste installed 6.1 with the Ubuntu ppa on my lab's machines...:
apt-get nstall sagemath-upstream-binary sagemath-optional
(we are in LTS, Ubuntu 12.04);
The directories:
sloane/
jones/
are installed in / !!! (yes: i say /)
idem if I do:
sage -i sage-mode
a directory ema
Le 10/02/2014 17:07, slelievre a écrit :
Jan Groenewald prepared a PPA for Sage 6.1.1, see his post on sage-release:
https://groups.google.com/d/msg/sage-release/qhQ2BPM34Z0/kmneDmNsuroJ
Great, it works fine.
Thanks!
May be it would be good to make mirrors of the ppa?
Nawadays I download sa
Hello,
may be you remember I made a patch to (old) versions of the notebook to
use ldap.
But, I am switching to sage 6.0, and I want to use ldap again.
So, I installed (system wide)
libldap2-dev libsasl2-dev
and
openssl
Then in sage:
./sage -sh
(sage-sh) easy_install python-ldap
Ok.
Then star
I cannot install graphviz:
sage -i graphviz...
make[3]: *** Pas de règle pour fabriquer la cible «
../../plugin/pango/libgvplugin_pango.la », nécessaire pour «
dot_builtins ». Arrêt.
make[3]: quittant le répertoire «
/usr/local/sage-6.0/local/var/tmp/sage/build/graphviz-2.16.1.p0/src/c
Dear colleagues,
Will there be a ppa version of 6.0 ?
Since I need to install sage on about 20 machines, the *.deb is nice
But I have time
t.d.
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Hello, all,
I am going to manipulate Legendre (P) polynomials.
So I do something like this:
sage: P.=QQ[]
sage: #generate de first Lagrange polynomial
sage: s=[legendre_P(i,x) for i in [0..2]]
sage: print s
[1, x, 3/2*x^2 - 1/2]
sage: #now, look at the parents
sage: s[0].parent()
Integer Ring
s
Something I do not understand...
from sympy import Symbol
t=Symbol("t",commutative=True)
A=Symbol("A",commutative=False)
B=Symbol("B",commutative=False)
So, now, I do:
ee=(t*t/2)*(A+B)*(A+B)
ee.expand()
gives:
t**2*A*B/2 + t**2*A**2/2 + t**2*B*A/2 + t**2*B**2/2
which is what I was waiting fo
Le 29/06/2013 14:21, Martin Albrecht a écrit :
Hi all,
do we have n-dimensional numerical integration in Sage? All I can find is 3D,
but what about higher dimensions?
Cheers,
Martin
MMhhh... I do not know any (free) library doing n-dimensional numerical
integration with n large. And so, there
g. The scitools spkg should be fixed, as far as I can see.
Regards,
Jan
Yes,
I apologize... it is a scitools problem...
yours
t.
On 22 June 2013 12:54, Thierry Dumont mailto:tdum...@math.univ-lyon1.fr>> wrote:
Hi,
Instal
Hi,
Install fails with:
Error installing package scitools++
Before this I get:
Removing
/usr/lib/sagemath/local/lib/python2.7/site-packages/SciTool
Hi,
I am experimenting with fast Fourier Transform in Sage.
It seems there are different possibilities.
1) There is: FastFourierTransform
FastFourierTransform(size, base_ring=None)
2) One can simply do:
v = vector(CDF,[1..10]);
v.fft()
3) One can directly use scipy/numpy which seems to use the
Le 22/02/2013 15:18, Piero a écrit :
Is there any support of bifurcation analysis in SAGE? Alternatively, are there
binding tools to AUTO or XPPAUT?
Many thanks
Not yet, as far as I know.
This would be great to integrate this in Sage!
t.d.
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Le 22/11/2012 08:53, Jori Mantysalo a écrit :
Getting back to this old question... Version 5.4. has been released. How
to set up ldap? Or some kind of external authentication, like CAS or AD?
Has anyone made this? I'm stuck with old errors (this time "Failed to
load application: No module named
Le 23/08/2012 00:33, Nathan Yeung a écrit :
Hi,
I would like to add CAS/LDAP authentication to the Sage Server I just created.
Does anyone know how to do that for Sage?
Sincerely,
Nathan Yeung
BYU Math CSR
I implemented a *very* minimal patch of the notebook, to do ldap
identification; it is
Trying:
sage -i graphviz...
I get:
mv -f .deps/no_demand_loading.Tpo .deps/no_demand_loading.Po
make[3]: *** Pas de règle pour fabriquer la cible «
../../plugin/pango/libgvplugin_pango.la », nécessaire pour «
dot_builtins ». Arrêt.
make[3]: quittant le répertoire «
/usr/local/sage-5.0/spkg/bu
Failure: twisted.python.failure.DefaultException: Bad token
Yours,
Thierry Dumont.
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Le 08/03/2012 14:44, Jori Mantysalo a écrit :
On Mon, 5 Mar 2012, P Purkayastha wrote:
It works here on "vanilla" sage-4.8, sage-4.8+new flask notebook+new
jmol,
and sage-5.0beta2+new flask notebook+new jmol with both opera-11.61 and
firefox-10.0.2 on Gentoo 64 bit. java is the 64bit variety fr
Hello,
We use sage 4.8
The following line:
W=WeylGroup("F4")
works in command line, BUT
do not work when evaluated in the Notebook:
Error message is:
Traceback (most recent call last):
File "", line 1, in
File "_sage_input_4.py", line 10, in
exec compile(u'open("___code___.py","w").w
I apologize for my preceding e-mail (04/11); I recall that I got the
message:
"
sage -upgrade
...
Do you want to continue [y/N]? y
There are uncommitted changes in the Sage root repository. Aborting.
"
Actually, this was the first time I got this message (I have made at
least 5 upgrades in the
Hello,
sage -upgrade
...
Do you want to continue [y/N]? y
There are uncommitted changes in the Sage root repository. Aborting.
1) I did not change anything in the Sage repository since the
installation of 4.7.1, except the sage script in SAGE_ROOT.
I did not get this message at the preceeding
Dear sage-support,
Is there a possibility ti visualize a Picture in the notebook ?
For example: we read a .png image, and we would like to modify it, treat
it and so on (we know how to to this with sage); at the end visualize
the result in the notebook (we do not know how to do this...).
yours
For a small introduction to Sage, I want to show what is really called,
for a set of problems, depending on, say, the field we use:
Example:
from sage.misc.citation import get_systems
A=Matrix(RDF,[[1,3,2],[1,4,2],[0,5,2]])
B=vector(RDF,[1,2,3])
get_systems ('A.solve_left(B)')
['numpy', 'scipy']
Dear Colleagues,
Using 4.7, we got the following bug,... Sage-4.7 was obtained by
upgrading from source the last preceeding version.
Here is the gdb run.
Yours
t.d.
germoni@damysos:~$ sage -gdb
--
| Sage Version 4.7, Release D
It seems that there is a problem with content.wuala.com.
sage -upgrade
Automatically selected server content.wuala.com
(http://content.wuala.com/contents/phatsphere/edoras/sage-mirror/).
Downloading packages from
'http://content.wuala.com/contents/phatsphere/edoras/sage-mirror//spkg'
One of my colleagues uses a Macintosh with a Japanese environment.
He cannot upgrade sage (4.6.1).Here is a transcription of what happens.
Any idea?
gcc version 4.2.1 (Apple Inc. build 5664)
abort: unknown encoding: x-mac-japanese, please check
Why not compute in QQ? Sage is done for this...:
sage: s1=sum(10^(-q^2/1) for q in range(-1,1))
(wait some time...)
sage: s2=sum(10^(-k^2/1) for k in range(-2,2))
(drink a large cup of coffee)..
then:
sage: t=s1-s2
sage: float(t)
0.0
ok, let's try more precise:
sage: R
One of my colleague want Macaulay2.
Macaulay2 does not appear in the list of optional packages.
BUT: sage -i macaulay2 downloads the packages.
It says: need gdbm. Ok, we install it.
then: sage -i macaulay2 fails again: no correct autoconf available.
Questions:
1) what about macaulay2 ?
2) Is
Hello,
On our Sage server, we have a lot a students doing simple computer algebra.
Our version of Sage is 4.5.3 on Debian Lenny.
We have a lot of segfaults in maxima:
2329777.996283] maxima[26150]: segfault at 7fff13abfa30 ip 7fa21cac8921
sp 7fff13abfa30 error 6 in libgc.so.1.0.3[7fa21caaf000
Le 18/09/2010 16:31, KvS a écrit :
Hi again,
I hope you don't mind me bumping this thread one more time. I started
experimenting with trying a few things for fast arbitrary precision
computations using Cython. Above it was suggested to use MPFR
directly, so without the RealNumber wrapper, as the
I want to patch sagenb (to add ldap identification). I did it some time
ago by modifying notebook.py, avatars.py in in a cloned verion of Sage.
Now that we have a separate package sagenb, what is the best way to
proceed ? I can download sagenb, untar it, make my modifications and then???
Or i
Le 20/06/2010 16:14, Patrick ABOU BAKAR a écrit :
I know that SAGE contains its own installation of pretty much of all
the modules it depends on..
My assumption is that there is a table that holds the username and
password of the users as they sign up..
What SGBD is used for it? (SQLite, Postre
As a marginal remark, PyDSTools use Radau code from Hairer and Wanner,
which a much more robust method than all what is included in GSL (and
Scipy). The tools for integrating ODEs available in Sage are far from
being the best available.
t.d.
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installation?
John
For system wide install you *must* do this as priviledged user (sudo or
su depending on your system).
Otherwise you will not have write access to /usr/local
Thierry
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To compile Lie you must (or your systeme administrator) add some tools
on your machine:
-bison
-the ncurses lib.
On an Ubuntu machine, I installed (apt-get): libncurses5, libncursesw5 ,
ncurses-base ncurses-bin and bison. It will take 5 minutes to your
administrator. Then it will be ok.
t.d.
Le 30/04/2010 18:54, Robert Bradshaw a écrit :
O
sage: m = matrix(RDF, 5, sparse=True)
sage: type(m)
So it's our completely generic sparse implementation, stored as a
dictionary of non-zero entries.
http://hg.sagemath.org/sage-main/file/e2ccb846f296/sage/matrix/matrix_generic_sparse.pyx#l1
I have questions about RDF (and CDF) sparse matrices. How are they
implemented?
-for dense matrices, sage uses Scipy matrices and this is transparent.
-but, how are sparse matrices (RDF,CDF) implemented?
1) Are they Scipy matrices ?
2) if yes: there are different data structures for sp
Le 16/04/2010 17:35, William Stein a écrit :
On Friday, April 16, 2010, kcrisman wrote:
Has anyone ever seen this when importing worksheets?
Permission denied: '/home/notebook/sage_notebook/worksheets/kcrisman/2/
cells/37'
In this case, I saved something from my laptop on 4.3.5 to an old
I want to use "RDF" linear algebra.
As far as i understand, operations are implemented using numpy/scipy.
But many things differ from a direct call to scipy modules; for example:
(computing the Singular Value Decomposition of a matrix):
sage: A=matrix(RDF,[[1,3,2],[1,2,3],[0,5,2],[1, 1, 1]])
sa
Alec Mihailovs a écrit :
On Apr 9, 8:59 pm, William Stein wrote:
A 5000x5000 matrix just isn't really that big, IMHO...
That's true - should work in just few seconds - I meant REALLY big
matrices - actually, sometimes such a thing should work faster even
for not that big matrices - in case i
Rajeev a écrit :
Hi,
sage has gsl as one of the included packages, which is very good for
numerical solution of differential equations. have a look at examples
on the wikipage -
http://wiki.sagemath.org/interact/diffeq
'Vector Field with Runga-Kutta-Fehlberg' by Schilly is one of my
favorites. i
William Stein a écrit :
> On Fri, Dec 18, 2009 at 11:53 PM, Thierry Dumont
> wrote:
>> Carlos Córdoba a écrit :
>>> Hi,
>>>
>>> I know this is not a general mathematical forum, but I hope you can help me.
>>> I have this PDE:
>>>
>
Carlos Córdoba a écrit :
> Hi,
>
> I know this is not a general mathematical forum, but I hope you can help me.
> I have this PDE:
>
> \frac{dB}{dt} = F(x,y,z)B(x,y,z) - G(x,y,z)\nabla B(x,y,z)
>
> and I don't know how to solve it numerically. What would be the easiest
> method to do it? It can
William Stein a écrit :
> On Wed, Nov 11, 2009 at 6:22 PM, Kwankyu wrote:
>> Hi,
>>
>> I have a problem starting a sage server after, I think, upgrading to
>> Ubuntu 9.10 server edition. It just hangs at the point "Generating a
>> 2048 bit RSA private key..." See the following transcript:
>>
>>
>
One of our Sage users want to make computations with Gap, from inside Sage.
So his commands are:
>sage
>gap.console()
then he can read his Gap program, start to run it, but the program
aborts by lack of memory.
Classically, he uses gap directly, by typing:
> gap -o 4G (to get 4 Giga Bytes).
I
William Stein a écrit :
> On Mon, Sep 28, 2009 at 5:53 AM, Thierry Dumont
> wrote:
>> Trying to solve my problem:
>>
>> "
>> THERE WAS AN ERROR LOADING THE SAGE LIBRARIES. Try starting Sage from
>> the command line to see what the error is
>> "
William Stein a écrit :
> 2009/9/29 Thierry Dumont :
>> Super..
>> Question: can we have users of the pool on different machines now? (the
>> directory beiing shared by nfs), and having the same groups on the
>> different machines?
>
> In theory, yes, if you
Super..
Question: can we have users of the pool on different machines now? (the
directory beiing shared by nfs), and having the same groups on the
different machines?
William Stein a écrit :
> On Tue, Sep 29, 2009 at 1:00 PM, ma...@mendelu.cz wrote:
>>
>>
>> On 26 zář,
ma...@mendelu.cz a écrit :
>
>
> On 26 zář, 15:27, Thierry Dumont wrote:
>> ... strange only for me I hope.
>>
>
> I have similar problem. As I undesrstand, if the user sage runs
> program sage and user sageuser is in server_pool, then .sage directory
> shou
Trying to solve my problem:
"
THERE WAS AN ERROR LOADING THE SAGE LIBRARIES. Try starting Sage from
the command line to see what the error is
"
when launching the notebook with a server_pool, I added manually the path:
$SAGE_ROOT/local/lib
(with $SAGE_ROOT hard coded).
This changed nothing.
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