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
Hey SFA users...
I've been working on a patch to change how symmetric functions are used in
the future. I will be deprecating some common functions soon on the sage
combinat queue and we will try to get this into sage in an upcoming
version. Starting soon: SFAxxx where xxx in {Schur,
Hi,
I should add that one thing that should really be tested in addition to
behavior is *speed*!
With these changes there might be potential slow-down from previous
versions.
We don't want this to happen. I've tested a bit, but this is one thing
that is even more difficult to identify than a
On Thu, Jun 7, 2012 at 12:26 PM, Mike Zabrocki mike.zabro...@gmail.com wrote:
Hey SFA users...
I've been working on a patch to change how symmetric functions are used in
the future. I will be deprecating some common functions soon on the sage
combinat queue and we will try to get this into
Hi Mike,
Very impressive work! I am glad you took over my initial patch.
I will send you more comments off-line except for the main issues
that need to be discussed with everyone.
Franco:
Moreover, LLT polynomials, Hall-Littlewood, Jack and Macdonald symmetric
functions have all been moved
Hi Mike,
I did some timing tests on the old and new code:
sage: Sym = SymmetricFunctions(QQ['q','t'].fraction_field())
sage: s = Sym.schur()
sage: m = Sym.monomial()
sage: timeit('m(s([6,3,3,2,1]))')
25 loops, best of 3: 8.51 ms per loop
sage: timeit('m(s([10,6,3,3,2,1]))')
5 loops, best of 3:
Nils Bruin nbr...@sfu.ca 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
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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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?
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
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
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 by
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 has
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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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 Apple
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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On Wed, Jun 6, 2012 at 10:20 PM, Nils Bruin nbr...@sfu.ca 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
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!
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
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 was
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.
Can you perhaps provide a new SPKG? I'm happy to try.
On 7 June 2012 19:38, Volker Braun vbraun.n...@gmail.com 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
On 7 June 2012 19:37, Jason Grout jason-s...@creativetrax.com 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
On Jun 7, 8:02 am, Dima Pasechnik dimp...@gmail.com 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,
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
Anthony Wickstead anthony.wickst...@gmail.com 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
On Jun 7, 3:40 pm, mmarco mma...@unizar.es 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:
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 only
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
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
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
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]
...
On Jun 7, 4:19 pm, William Stein wst...@gmail.com 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 =
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
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 benjaminfjo...@gmail.com wrote:
I haven't seen this before, after logging in to trac.sagemath.org:
Traceback (most recent call last):
File
On Thu, Jun 7, 2012 at 4:41 PM, Nils Bruin nbr...@sfu.ca wrote:
On Jun 7, 4:19 pm, William Stein wst...@gmail.com 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,
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
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
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
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 crypt
On Jun 7, 6:41 pm, Maarten Derickx m.derickx.stud...@gmail.com
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
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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On Jun 7, 7:46 pm, Jason Grout jason-s...@creativetrax.com 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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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;
On Thu, Jun 7, 2012 at 7:23 PM, Maarten Derickx
m.derickx.stud...@gmail.com 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,
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
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,
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