> Then, do you know how to do your computation within c/c++? Do you want to
> use the ArtinBraid or BandBraid class?
For the moment, i am working only with the ArtinBraid form. I tried to
write a small c++ program to implement the left normal form, calling
WordToBraid and then .LCF but i couldn't
On Jun 7, 10:29 pm, Rob Beezer wrote:
> I would be in favor of a right kernel matrix having its vectors as
> columns. It looks like this would save some transposes on the exit from
> the actual routines doing the computations.
That would be the *ONLY* reason. In general it seems that Sage vector
On Friday, June 8, 2012 1:40:05 AM UTC+6, mmarco wrote:
>
> Chevie does have some of this (at least it has something similar to a
> left normal form, which is the basis for the rest). It can compute the
> left normal form faster than my python code, but it has some
> drawbacks: it runs on gap3
So William knows my memory is faulty, and I finally overcame my own
laziness and looked at the code (and the ticket where this originated,
http://trac.sagemath.org/sage_trac/ticket/10746). IML, PARI, Sage generic
code produce right kernels. These come in different formats, so one option
for th
On Thu, Jun 7, 2012 at 7:23 PM, Maarten Derickx
wrote:
>
>
> Le jeudi 7 juin 2012 05:20:02 UTC+2, Nils Bruin a écrit :
>>
>> As remarked on:
>>
>> http://wiki.sagemath.org/SageServer
>>
>> it's essentially impossible to safely run sage to natively listen on
>> port 80 or port 443, because these ar
This happend in the past also. It was an issue with to many connections to
the database still being open for some reasons. It should be (at least till
for the short future) fixed now.
Le vendredi 8 juin 2012 02:54:05 UTC+2, kcrisman a écrit :
>
> I just got this too. Just keep on trying; appare
On Jun 7, 7:46 pm, Jason Grout wrote:
> On 6/7/12 9:36 PM, Nils Bruin wrote:
>
> > Firefox& Sage 5.0.
>
> Sage 5.0 with the included notebook? Or the new flask notebook (like
> what is running on *.sagenb.org)?
I'm not that adventurous. Stock Sage 5.0.
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On 6/7/12 9:36 PM, Nils Bruin wrote:
Firefox& Sage 5.0.
Sage 5.0 with the included notebook? Or the new flask notebook (like
what is running on *.sagenb.org)?
Jason
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sag
On Jun 7, 6:41 pm, Maarten Derickx
wrote:
> When I do it in sage5.0 using google chrome I get redirected to the login
> page. What version of sage and which browser do you use?
Firefox & Sage 5.0. There's something funny with that setup anyway --
sometimes, the logout button doesn't work, which i
Le vendredi 8 juin 2012 04:04:07 UTC+2, jason a écrit :
>
> On 6/7/12 8:41 PM, Maarten Derickx wrote:
>
> > ps. Hidden sage security easter egg: Is you password longer then 8
> > characters? Then try to just type the first 8
>
> Until you change your password. A year ago we switched from using
Le jeudi 7 juin 2012 05:20:02 UTC+2, Nils Bruin a écrit :
>
> As remarked on:
>
> http://wiki.sagemath.org/SageServer
>
> it's essentially impossible to safely run sage to natively listen on
> port 80 or port 443, because these are privileged ports and sage
> currently doesn't have convenient
On 6/7/12 8:41 PM, Maarten Derickx wrote:
ps. Hidden sage security easter egg: Is you password longer then 8
characters? Then try to just type the first 8
Until you change your password. A year ago we switched from using crypt
to using sha256, so any recent accounts and any recently-changed
When I do it in sage5.0 using google chrome I get redirected to the login
page. What version of sage and which browser do you use?
ps. Hidden sage security easter egg: Is you password longer then 8
characters? Then try to just type the first 8
Le jeudi 7 juin 2012 02:03:48 UTC+2, Nils Bruin a é
On Thu, Jun 7, 2012 at 4:41 PM, Nils Bruin wrote:
> On Jun 7, 4:19 pm, William Stein wrote:
>> Hi Sage-Devel,
>>
>> I'm randomly running into segfaults when multiplying matrices over the
>> integers, in the course of doing basic modular symbols calculations.
>> For example, sometimes (but not alw
I just got this too. Just keep on trying; apparently developing for
Sage is very popular right now :)
On Jun 7, 8:02 pm, Benjamin Jones wrote:
> I haven't seen this before, after logging in to trac.sagemath.org:
>
> Traceback (most recent call last):
> File "build/bdist.linux-x86_64/egg/trac/w
I haven't seen this before, after logging in to trac.sagemath.org:
Traceback (most recent call last):
File "build/bdist.linux-x86_64/egg/trac/web/api.py", line 436, in send_error
data, 'text/html')
File "build/bdist.linux-x86_64/egg/trac/web/chrome.py", line 803, in
render_template
mes
On Jun 7, 4:19 pm, William Stein wrote:
> Hi Sage-Devel,
>
> I'm randomly running into segfaults when multiplying matrices over the
> integers, in the course of doing basic modular symbols calculations.
> For example, sometimes (but not always), this crashes:
>
> sage: M = ModularSymbols(389,sign=
Hi Sage-Devel,
I'm randomly running into segfaults when multiplying matrices over the
integers, in the course of doing basic modular symbols calculations.
For example, sometimes (but not always), this crashes:
sage: M = ModularSymbols(389,sign=0).cuspidal_submodule().decomposition()[0]
...
/Users
Greg,
I got something that seems to work. I don't take the time to set up a ropemacs
project (since I don't know what I'm doing), but if you could test it to see if
it works for you that would be great. If it does work then we can put the
instructions on the wiki, and/or make an spkg or some
I suggest you first make a spkg for cbraid that installs the headers/libary
in the appropriate place.
Then, do you know how to do your computation within c/c++? Do you want to
use the ArtinBraid or BandBraid class?
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To unsu
In the link i gave, both cbraid and braiding are mixed in a single
project, also called cbraid. So when i said cbraid i actually meant
cbraid+braiding.
So far, what i have done is specific for braids. A framework for more
general groups (artin or garside, for example) would require a
different p
> With all that in mind, i considered cbraid as a good option, since it
> is very fast, and small. Other option would be to try to optimize my
> python code, but i think it will be always be slow. Maybe cythonizing
> some parts of it would make it faster, but i have noted that
> cythonizing code o
On Jun 7, 3:40 pm, mmarco wrote:
> Both gap4 packages (braid and mapclass) don't deal with braid groups
> themselves, but with the orbits of a certain actions of them (and more
> general groups). I mean, they don't implement the usual stuff one
> would expect in a braid group: normal forms, bura
Anthony Wickstead writes:
> Using 64 bit Ubuntu 12.04 inside VirtualBox 4.14 under Windows 7, I was able
> to
> make sage-5.0.1.rc0 with no errors.
What hardware CPU does your computer have?
> Running ./sage –testall resulted in just one error:
>
> Sage –t –force_lib “devel/sage/sage/schemes/pl
Both gap4 packages (braid and mapclass) don't deal with braid groups
themselves, but with the orbits of a certain actions of them (and more
general groups). I mean, they don't implement the usual stuff one
would expect in a braid group: normal forms, burau representation, lcm
and gcd, conjugation p
On Jun 7, 8:02 am, Dima Pasechnik wrote:
> On Thursday, 7 June 2012 13:50:59 UTC+2, Volker Braun wrote:
>
> > Is cbraid really the best/fastest implementation of braid groups out
> > there? How does it compare to what GAP can do?
>
> Indeed, there is (nonstandard) GAP package "braid", packaged i
On 7 June 2012 19:37, Jason Grout wrote:
> On 6/7/12 1:32 PM, Martin Albrecht wrote:
>>
>> Hi,
>>
>> Brice (for [sage-devel]: he's from the LinBox project) and I are at
>> the "Efficient Linear Algebra for Gröbner Basis Computations" workshop
>> at the moment and got kind of sidetracked into updat
Can you perhaps provide a new SPKG? I'm happy to try.
On 7 June 2012 19:38, Volker Braun wrote:
> Can you try with the newest ATLAS? 3.9.77 just came out and should be pretty
> much to the final release. The Sage testsuite always found some errors in
> the combination of the newer atlas and linbo
Argh, pressed sent by accident. Now again:
Hi [sage-devel], (CC [linbox-devel] FYI)
Brice (for [sage-devel]: he's from the LinBox project) and I are at
the "Efficient Linear Algebra for Gröbner Basis Computations" workshop
at the moment and got kind of sidetracked into updating LinBox in
Sage.
S
On 6/7/12 1:32 PM, Martin Albrecht wrote:
Hi,
Brice (for [sage-devel]: he's from the LinBox project) and I are at
the "Efficient Linear Algebra for Gröbner Basis Computations" workshop
at the moment and got kind of sidetracked into updating LinBox in
Sage.
Sage still uses version 1.1.6 which wa
Can you try with the newest ATLAS? 3.9.77 just came out and should be
pretty much to the final release. The Sage testsuite always found some
errors in the combination of the newer atlas and linbox...
On Thursday, June 7, 2012 7:32:15 PM UTC+1, Martin Albrecht wrote:
>
> Brice (for [sage-deve
Hi,
Brice (for [sage-devel]: he's from the LinBox project) and I are at
the "Efficient Linear Algebra for Gröbner Basis Computations" workshop
at the moment and got kind of sidetracked into updating LinBox in
Sage.
Sage still uses version 1.1.6 which was released 4 years ago, this is
embarrassing
On Wed, Jun 6, 2012 at 10:20 PM, Nils Bruin wrote:
> Another solution is to use "iptables nat" to forward the port:
>
> iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 443 -j REDIRECT --
> to-port 8000
>
> Any comments on the pros and cons of these approaches? I thought one
> of the pros is t
On 2012-06-07 15:58, Dima Pasechnik wrote:
> Hi Jeroen,
> and how about segfaults while building gcc spkg?
These only happened with old versions of XCode 4 I think.
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sage-devel+
Hi Jeroen,
and how about segfaults while building gcc spkg?
Are they gone, too?
On Thursday, 7 June 2012 14:28:59 UTC+2, Jeroen Demeyer wrote:
>
> On 2012-06-07 12:31, Dima Pasechnik wrote:
> > Dear all,
> > Are there bug reports filed regarding issues with Xcode 4?
> > Someone who works at Ap
Using 64 bit Ubuntu 12.04 inside VirtualBox 4.14 under Windows 7, I was
able to make sage-5.0.1.rc0 with no errors.
Running ./sage –testall resulted in just one error:
Sage –t –force_lib “devel/sage/sage/schemes/plane_curves/curve.py”
Tony Wickstead
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On 2012-06-07 12:31, Dima Pasechnik wrote:
> Dear all,
> Are there bug reports filed regarding issues with Xcode 4?
> Someone who works at Apple asked me for details of the troubles we
> have with building Sage using Xcode 4, so I would like to supply as
> much detail as possible.
The situation ha
On Thursday, 7 June 2012 13:50:59 UTC+2, Volker Braun wrote:
>
> Is cbraid really the best/fastest implementation of braid groups out
> there? How does it compare to what GAP can do?
Indeed, there is (nonstandard) GAP package "braid", packaged in
gap_packages spkg, and
as far as I am told b
Is cbraid really the best/fastest implementation of braid groups out there?
How does it compare to what GAP can do? Just from glancing at it, the
author doesn't use many C++ features. Not necessarily a minus. It
implements bubble sort, really? Also seems to be very hard to maintain,
many nested
I have been working on an implementation of braid groups for sage
(together with free and finitely presented groups). So far i have a
preliminary version (see ticket #12339). It is still not feature
complete and also very slow compared to cbraid[1], for example, but
it
is usable.
In order to s
On 6/6/12 10:20 PM, Nils Bruin wrote:
Another solution is to use "iptables nat" to forward the port:
iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 443 -j REDIRECT --
to-port 8000
Just double-checking: this means that you run with secure=True, and the
notebook itself does the SSL, right
Dear all,
Are there bug reports filed regarding issues with Xcode 4?
Someone who works at Apple asked me for details of the troubles we
have with building Sage using Xcode 4, so I would like to supply as
much detail as possible.
Thanks,
Dima
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Nils Bruin writes:
> As remarked on:
>
> http://wiki.sagemath.org/SageServer
>
> it's essentially impossible to safely run sage to natively listen on
> port 80 or port 443, because these are privileged ports and sage
> currently doesn't have convenient mechanisms to relinquish privileges
> after o
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