on
e.g. floats and strings in the python source, and they never use this
trick.
I would feel much more comfortable if there was some "mainstream"
precedent for this.
Scary: when I googled "python inplace operators" to try to find a
precedent, the sixth link was a talk I gav
you can avoid refcounting. For example maybe
you're doing a row operation in a generic matrix class, or something
like that.
david
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roups ever computed."
http://groups.csail.mit.edu/cis/theses/sutherland-phd.pdf
david
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ne have *any* idea at all what the hell is going on?
david
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On Sep 8, 2007, at 11:00 AM, Joel B. Mohler wrote:
>
> Hi David,
>
> I think this may be something in your ambient environment which
> scons handles
> differently than autoconf and friends.
Is "ambient environment" a technical unix term? Is that the same as
my
> Has anyone else actually built sage-2.8.4 from scratch on sage.math?
>>
>
> I believe William did do, I didn't try in person.
Sorry I should rephrase that question: has anyone else actually built
2.8.4 and succesfully *run* it on sage.
I was really starting to go nuts.
david
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On Sep 10, 2007, at 4:44 PM, Joel B. Mohler wrote:
>
> Hi,
>
> David Harvey raised a speed question on
> http://sagetrac.org/sage_trac/ticket/628
> It's a legitimate concern, but as far as I can tell, it's a completely
> orthogonal issue to that specific
sues.
What I'm more worried about is cython compatibility, especially if
python internals have changed a lot.
david
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2.x code.
But who knows I guess we'll find out in the next few years.
david
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For more op
to figure out what to change. I would recommend
that whoever works on getting 4.2.2 up and running first disables the
gcd patch (that's commenting out one line in the install script), and
once 4.2.2 is working on all platforms, then w
re's a whole family of gcd
algorithms with that complexity, see for example
http://perso.ens-lyon.fr/damien.stehle/BINARY.html
The old code (i.e. in GMP 4.2.1 and 4.2.2) has complexity O(n^2).
david
--~--~-~--~~~---~--~~
To post to this group,
lared using
> cdef incr(self)
> instead of
> def incr(self).
> in tr_data.spyx. But if I do this, how do I then access incr in
> totallyreal.py?
You mean significant *less* overhead?
You can't access a cdef method directly from python. It can only be
accessed fr
uld be valid but not x = var('x'); sqrt(x). This
would provide some
mathematical rigor without killing usability.
--David
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x27;t we try to get a photo of one of these:
http://en.wikipedia.org/wiki/Squash_bug
david
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For more options, vis
g fmpz_poly will kill the machine for
certain kinds of sparse polynomials. For example if you create the
polynomial x^100 + 2^100, then NTL is perfectly fine with
that, but fmpz_poly will try to allocate a million coefficients with
a million bits each. Boom.
david
--~--~
On 9/17/07, William Stein <[EMAIL PROTECTED]> wrote:
> On 9/17/07, Peter G. Doyle <[EMAIL PROTECTED]> wrote:
> > I have recently discovered SAGE, which I think is really quite amazing.
> >
> > I am contemplating introducing the students in our honors calculus course
> > here at Dartmouth to SAGE.
On 9/17/07, William Stein <[EMAIL PROTECTED]> wrote:
> On 9/17/07, Robert Bradshaw <[EMAIL PROTECTED]> wrote:
> > > It sounds from what you write though, that it is best to just stick
> > > with the "upload" / "download" terminology, since it is *very* clear
> > > in which direction the file goes
c are "the same"?
david
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On Sep 17, 2007, at 11:55 PM, William Stein wrote:
> And, if anybody out there thinks adding the above to the preparser
> would make you positively cringe in disgust, please speak up!
> (It doesn't mean we won't add it anyways...)
Positively cringe in
the positive real roots in each case), it cannot be assumed
that this will hold in the particular algebraically closed field, since the
roots are only defined algebraically." (
http://www.msri.org/about/computing/docs/magma/html/text704.htm)
David
--~--~-~--~~~---
I have no ideas, but would like to mention the OS
constraint solver eclipse http://eclipse.crosscoreop.com/
probably belongs to the same family of programs.
This was mentioned at the GAP conference but I've forgotten
why now. (Maybe Marc Roeder used it?)
On 9/19/07, William Stein <[EMAIL PROTECT
and can be found on his web page:
http://perso.ens-lyon.fr/damien.stehle/english.html
It might take some art to decide on optimal parameters, but linking it
into
SAGE should provide the same asymptotic performance as in Magma.
--David
--~--~-~--~~~---~--~~
To po
l -verbose, then it gets through the
constructions guide with no problems, in about 30 seconds!
david
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For more opti
I think you are talking about the effect of your new
docstrings on the reference manual?
At this point, only William can do that, I believe.
+
On 9/21/07, Jason Grout <[EMAIL PROTECTED]> wrote:
>
> I changed some of the documentation in graphs/graph.py (formatted it
> using Latex
On 9/21/07, William Stein <[EMAIL PROTECTED]> wrote:
>
> On 9/21/07, Jason Grout <[EMAIL PROTECTED]> wrote:
> > I changed some of the documentation in graphs/graph.py (formatted it
> > using Latex). How do I build a new manual to see my changes?
>
> cd SAGE_ROOT/devel/doc/ref
> ./build_pdf
>
> Th
I don't know how this post made it through the moderated new
members filter. He joined on the 20th. Banned, reported, and deleted.
On 9/22/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
>
>
>
> اÙسÙاÙ
عÙÙÙÙ
> اخÙاÙÙ ÙاخÙاÙÙ ÙØ°Ù Ù
ÙÙ Ù
رÙÙ ÙتشغÙ٠اÙÙراÙ
.4.10, intel core duo.
What happens if you do
sage -testall -verbose
?
david
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On Sep 22, 2007, at 10:47 AM, John Cremona wrote:
>
> Strange: after adding -verbose, it has got way past the point where
> it had previously stuck (but has not finished the testall yet).
Yes this is what happened to me too. I have no idea what to make of
thi
If there is any interest, I can ask Chris Brown, who I know fairly
well. I think I asked him about licenses once. I vaguely remember him saying
all his stuff is GPL-compatible (or even public domain) but saclib
is separate.
On 9/22/07, Jason Grout
the Sage GMP package to 4.2.2 right now.
>
> Thoughts?
I wonder whether the GMP folks would consider releasing under both
LGPL v2 and v3.
david
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On 9/23/07, William Stein <[EMAIL PROTECTED]> wrote:
>
> Hi,
>
> Michael Abshoff pointed out to me that GMP 4.2.2 has been released!
> Very exciting. The
> release notes list exactly one new feature:
>
> From http://gmplib.org/gmp4.2.html
>
> New features of GMP 4.2.2
> * License is now LGPL
On 9/23/07, William Stein <[EMAIL PROTECTED]> wrote:
>
> On 9/23/07, Jason Martin <[EMAIL PROTECTED]> wrote:
> > Some thoughts:
> >
> > 1. I've been doing some performance comparisons on GMP 4.2.2 with the
> > patches that Sage uses, and I haven't seen any remarkable differences
> > between 4.2.2
On 9/23/07, William Stein <[EMAIL PROTECTED]> wrote:
>
> On 9/23/07, Jason Martin <[EMAIL PROTECTED]> wrote:
> > Some thoughts:
> >
> > 1. I've been doing some performance comparisons on GMP 4.2.2 with the
> > patches that Sage uses, and I haven't seen any remarkable differences
> > between 4.2.2
On 9/23/07, Joel B. Mohler <[EMAIL PROTECTED]> wrote:
>
> On Sunday 23 September 2007 15:46, William Stein wrote:
> > However, in the COPYING file for Sage itself, I wrote: "All original
> > SAGE code is distributed under the terms of the GNU General Public
> > License *Version 2*."
> >
> > Just
r.
> >
> > See:http://www.gnu.org/licenses/why-not-lgpl.html
> > Do I smell something?
> >
> >
> >
> > > Just out of curiosity, would anybody be angry if I were to remove the
> > > words "*Version 2*" from the above sentence in the
suspect GMP is likely to
improve a lot in the next few years.
david
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Could you please elaborate on this a bit? What is it about the GPL
that you don't like? If you were to contribute code to SAGE, what
would be your ideal license?
david
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construction
of minimal models.
If a proper class of isogenies is defined, then adding the parent
and coercions can be added easily.
--David
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me of
the infrastructure that you're trying to implement is exactly what I was
working on before I got too busy this summer to work on Sage.
I have some time to work on Sage this week. Let me know when you're free
and perhaps you, David and I can work on it together, though this might
On 9/24/07, Jaap Spies <[EMAIL PROTECTED]> wrote:
>
> Jason Martin wrote:
> > My vote would be to change the sage license to "GPLv2 or later" and
> > try to get the Singular developers to do likewise. Mainly because
> > that is less work.
> >
> > Does changing Sage to "v2 or later" require Sage t
y handling in such cases. I've heard claims that this
could double the multiplication speed on some architectures, and that
wouldn't surprise me at all.
david
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T
fferent at all)? Does ZZ_pE take care of the preconditioning
for me?
David
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pper triangular)
matrix.
You could cc me in relevant messages to make sure that I response --
we
have a one-week teaching break, but need to pack up my office this
week.
--David
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, and I
> suspect
> it wouldn't hold up in court on those grounds.
Well, as long as "is similar in spirit" is interpreted by a court in
the way we all would hope, then that's all good.
I hope we can leave all this licensing stuff behind soon and get on
Thank you for the summary.
GAP also has conventions, though I don't know how official they
are. Typically a boolean response starts with "Is" (as is "IsAbelainGroup")
and an in-place modification has the work "Mutable" in the
command name somewhere.
On 9/27/07, Jason Grout <[EMAIL PROTECTED]> wr
code
is wanted for the inline than for the library version, then
__GMP_FORCE_foo arranges the inline to be suppressed, eg.
mpz_abs. */
So maybe those two functions are getting defined twice because some
choice about inlining is being screwed up.
david
--~--~-~--~~--
Agreed. Even linking the Spanish version is a good idea I think.
On 9/28/07, Ted Kosan <[EMAIL PROTECTED]> wrote:
>
> William wrote;
>
> > Here's a Google Translated version to English, which is enough
> > to understand most of the article:
>
> This is a very good article. Since he seems to be
On 9/28/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
>
> >> This is a very good article. Since he seems to be a fan of SAGE, I
> >> wonder if he would be willing to provide an English version of this paper
> >> so that it could be placed on the SAGE website?
>
> > Actually, when I asked him f
/22/07, Jason Grout <[EMAIL PROTECTED]> wrote:
>
> David Joyner wrote:
> > If there is any interest, I can ask Chris Brown, who I know fairly
> > well. I think I asked him about licenses once. I vaguely remember him saying
> > all his stuff is GPL-compatible (or even pub
The __init__ function in class Polynomial_generic_dense (in sage/
rings/polynomial/polynomial_element.pyx) is unnecessarily ugly
because of the absprec parameter showing up everywhere. This was
introduced I think by David Roe to deal with polynomials over p-adic
rings. But something smells
to write special cases for Q. I think it's a bad
idea to use the name "ideal" for the method that gives an ideal of
the ring of integers. I think we should give this a different name.
Any thoughts?
david
--~--~-~--~~~---~--~~
To post to this gr
On 10/3/07, Jason Grout <[EMAIL PROTECTED]> wrote:
>
> Does anyone have a clue why constructing subsets might be so slow?
>
> $ sage
> --
> | SAGE Version 2.8.5.1, Release Date: 2007-09-26 |
> | Type notebook()
(1) One "very easy" project which would be of significant benefit
is the following:
In maxima, you can save a gnuplot to a file using a command line option.
This (and some extra programming which William says is "easy")
enables one to view 3d graphics in the notebook. However, there is
one big pro
could do too).
SAGE is just using NTL for this, so it's doing whatever NTL is doing.
> I think mpz's have some special code for multiplications with
> long strings of zeroes in the representation.
I don't think this is true. The GMP documentation says explicitly to
at startup.
david
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URLs: http
sanely fast, even if the quality
isn't super-high; and then people should be able to select higher-
quality random number generators (at the expense of speed) if they like.
david
On Oct 8, 2007, at 8:33 PM, cwitty wrote:
>
> On Oct 8, 10:10 am, "William Stein" <[EMAI
I'm working on bringing __call__ into the coercion framework. Unlike
coerce, we need to worry about additional arguments besides just the object
x to be cast into the parent (I've included the list of all parent __call__
methods currently defined at the bottom of this e-mail).
Define call_map_fro
I filed a related ticket a few month ago:
http://sagetrac.org/sage_trac/ticket/467
david
On Oct 10, 2007, at 4:05 PM, William Stein wrote:
>
> On 10/10/07, Robert Bradshaw <[EMAIL PROTECTED]> wrote:
>>
>> Only 20% compared to base-10 strings? It seems like there sho
Excellent! Thanks. However, the pdf at
http://folk.uio.no/georgmu/Writings/SAGE-Oslo/
has some black pages. Do you know why this is?
+++
On 10/11/07, Georg Muntingh <[EMAIL PROTECTED]> wrote:
>
> I tied up the loose ends, and now you can find the PDF, ODP and
it really means "is_implemented_as_a_fraction_field".
david
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Thanks for thinking about this.
Other than licensing issues, which may or may not be relevant to your
question, one possibility to help with upgrades
is to create a new subdirectory (say examples/third-party,
or something) which is not touched by the upgrade process,
and then just reload overwri
Shpectorov and H. Voelklein,
and HAP, which I think has some briad-related stuff but I can't find
it right now.
>
> GAP3 had support for braid groups provided by the "share package"
> CHEVIE. Unfortunately, when the change to GAP4 was made, this was
> never ported over.
On 10/13/07, William Stein <[EMAIL PROTECTED]> wrote:
>
> Hi,
>
> Here is a link to my slides and demo for my ams plenary talk:
>
> http://sagemath.org/why/alb/
Looks like it will be a great talk. Wish I could make it!
>
> --
> William Stein
> Associate Professor of Mathematics
> University of
All tests pass on my machine as well.
David
On 10/14/07, William Stein <[EMAIL PROTECTED]> wrote:
>
>
> On 10/14/07, mabshoff > On Oct 14, 3:56 pm, "William Stein"
> <[EMAIL PROTECTED]> wrote:
> > > Hello,
> > >
> &g
It is already (somewhat) wrapped and is included in gap_packages*.spkg.
http://www.sagemath.org/doc/html/ref/module-sage.rings.real-field.html#l2h-3143
There is also a
IsomorphismTypeInfoFiniteSimpleGroup
http://www.gap-system.org/Manuals/doc/htm/ref/CHAP037.htm#SSEC015.11
and
StructureDescription
On 10/14/07, William Stein <[EMAIL PROTECTED]> wrote:
>
> Hello,
>
> I have released sage-2.8.7.rc1 here:
>
>http://sage.math.washington.edu/tmp/
>
> In particular, this link:
>
> http://sage.math.washington.edu/tmp/sage-2.8.7.rc1.tar
>
> Hopefully this will work with no doctest failures o
On 10/15/07, William Stein <[EMAIL PROTECTED]> wrote:
>
> Hi,
>
> I've posted rc2, which resolved a few remaining
> issues (a major bug in Cython and issues I had
> with two of the patches that fixed things):
>
> http://sage.math.washington.edu/tmp/sage-2.8.7.rc2.tar
>
> Also, it would be great if
Hi:
I fixed some bugs in the special functions module. The patch
is linked to in the trac ticket http://sagetrac.org/sage_trac/ticket/906
and passes sage -t. (This patch was originally created in Oct 2006
but never applied.)
- David Joyner
--~--~-~--~~~---~--~~
To
This version does not upgrade or install on suse 9.1 amd64.
I would not make it a priority since these machines are due to be upgraded,
but thought I'd let you know.
However, it does not install on suse 10.2 either!
In case this helps:
sage: An error occurred while installing flint-0.2.p4
Plea
On 10/16/07, mabshoff <[EMAIL PROTECTED]> wrote:
>
>
>
> On Oct 16, 4:26 pm, "David Joyner" <[EMAIL PROTECTED]> wrote:
>
> Hi David,
>
> > This version does not upgrade or install on suse 9.1 amd64.
>
> As far as I can tell Suse 9.1 AMD64 s
On 10/16/07, mabshoff <[EMAIL PROTECTED]> wrote:
>
>
>
> On Oct 16, 5:46 pm, "David Joyner" <[EMAIL PROTECTED]> wrote:
> > On 10/16/07, mabshoff <[EMAIL PROTECTED]> wrote:
> >
> >
> >
> > > On Oct 16, 4:26 pm, "
On 10/16/07, mabshoff <[EMAIL PROTECTED]> wrote:
>
>
>
> On Oct 16, 6:09 pm, "David Joyner" <[EMAIL PROTECTED]> wrote:
> > On 10/16/07, mabshoff <[EMAIL PROTECTED]> wrote:
> >
>
> Hi David,
>
>
>
> > > gcc blows up, t
Is rdef in sage 2.8.7?
David
On 10/16/07, Robert Bradshaw <[EMAIL PROTECTED]> wrote:
>
>
> On Oct 14, 2007, at 1:40 AM, Joshua Kantor wrote:
>
> >
> > Good to see that you got things sped up.
> >
> > The factor of 30 or so slowdown is consistent with my
ad.
>>> It's clever though (which is not good).
>>
>> I agree with that sentiment. On the other hand, I think
>>
>> sage: c = b.change_right(b.right().expand())
>>
>> is a bit cumbersome.
>>
>
> I totally agree. What is better?
How a
Umm..
sage: R. = QQ[]
sage: f = x^3 - 2
sage: f.factor_padic(2)
---
Traceback (most recent call
last)
/Users/david/sage-2.8.4/ in ()
/Users/david/sage-2.8.4/local/lib/python2.5/site-packages/sage
The reason is that that doctest has sage.:
David
On 10/18/07, David Harvey <[EMAIL PROTECTED]> wrote:
>
>
> Umm..
>
> sage: R. = QQ[]
> sage: f = x^3 - 2
> sage: f.factor_padic(2)
>
Yeah, that doesn't sound like a good idea.
David
On 10/18/07, David Harvey <[EMAIL PROTECTED]> wrote:
>
> Arrggghhh. When you do code inspection via factor_padic?, the period
> apparently gets filtered out. That's not very helpful somehow.
> david
> On Oct 18, 200
Arrggghhh. When you do code inspection via factor_padic?, the period
apparently gets filtered out. That's not very helpful somehow.
david
On Oct 18, 2007, at 10:37 AM, David Roe wrote:
> The reason is that that doctest has sage.:
> David
>
> On 10/18/07, David Harvey
Awesome. That's exactly what I was looking for. Thanks Timothy (and
William for writing it).
David
On 10/19/07, Timothy Clemans <[EMAIL PROTECTED]> wrote:
>
>
> Hi David,
>
> William made a worksheet for a class he taught in the summer that
> demonstrates the sie
ome of the
entries in different colors? How does show(M) turn M into a graphics
object?
If people have ideas for another approach, that would be welcome as well.
We've done a demo so far in GP and one in Mathematica. I want to get Sage
in the pict
On 10/21/07, William Stein <[EMAIL PROTECTED]> wrote:
>
> I think I know what's going on.
>
> If you install the Gap optional packages, then reset the
> workspace you get the behavior I see. If you don't install
> the optional packages you don't. Thus one of the packages
> changes the print beha
On 10/23/07, Jonathan Bober <[EMAIL PROTECTED]> wrote:
>
> Hi folks.
>
> I tried to send the following email a few hours ago (but I put the email
> address in wrong) and I don't feel like rewriting it all. So I should
> add to it now that I have upgraded sage (so I am running 2.8.8.1) and
> the er
y doing 8*8*8 multiplies.
david
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ltiplies are way below the strassen
cutoff. So basically it would end up looking like doing *integer*
multiplication with a multi-modular algorithm, which isn't such a
good idea :-)
david
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fined (__GMP_EXTERN_INLINE) || defined (__GMP_FORCE_mpz_size)
#if ! defined (__GMP_FORCE_mpz_size)
__GMP_EXTERN_INLINE
#endif
size_t
mpz_size (mpz_srcptr __gmp_z) __GMP_NOTHROW
{
return __GMP_ABS (__gmp_z->_mp_size);
}
#endif
It looks like they're trying pretty hard to make it inline.
david
--~--~-
On Oct 23, 2007, at 9:47 PM, William Stein wrote:
>
> On 10/23/07, David Harvey <[EMAIL PROTECTED]> wrote:
>>> For huge Z, I wonder if it's still trying to do multi-modular? That
>>> would probably be bad. I'm also not sure how much of the di
Thank you for reporting this bug.
This is now http://sagetrac.org/sage_trac/ticket/981
I'll try to work on it later today.
On 10/24/07, Biel <[EMAIL PROTECTED]> wrote:
>
> Dear all,
>
> I think that there is a bug in the module permgroup.py, at line 1226,
> the method conjugacy_classes_subgroups
I posted a link to a patch at
http://sagetrac.org/sage_trac/ticket/981
On 10/24/07, Biel <[EMAIL PROTECTED]> wrote:
>
> Dear all,
>
> I think that there is a bug in the module permgroup.py, at line 1226,
> the method conjugacy_classes_subgroups calls PermutationGroupElement;
> I think it should b
Does the lucky bug reporter get a prize?
david
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On 10/25/07, William Stein <[EMAIL PROTECTED]> wrote:
>
> On 10/25/07, Bill Hart <[EMAIL PROTECTED]> wrote:
> > There are some real surprises on that list. MPFR has many more lines
> > of code than I thought, Pari many fewer lines of code. It's amazing
> > what it achieves with such a small code b
sage: N = 5^1000
sage: R = Integers(N)
sage: S. = PolynomialRing(R)
sage: v = R(37)
sage: f = S([v])
Am I correct in saying that with the current codebase, the last line
in the above code is converting v to a ZZ_pX via a decimal string?
david
Sigh. I also made that change (but my padics code is probably not ready to
merge). I'll just merge my code with yours.
David
On 10/26/07, William Stein <[EMAIL PROTECTED]> wrote:
>
>
> On 10/26/07, David Harvey <[EMAIL PROTECTED]> wrote:
> > sage: N = 5^1000
&g
ic
of the generic function should be reported as a bug.
--David
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On 10/26/07, Jason Grout <[EMAIL PROTECTED]> wrote:
>
> I'm trying to numerically solve a system of equations. Currently I have:
>
> sage: var('x y p q')
> sage: eq1 = p+q==9
> sage: eq2 = q*y+p*x==-6
> sage: eq3 = q*y^2+p*x^2==24
> sage: solve([eq1,eq2,eq3,p==1],p,q,x,y)
> [[p == 3, q == 6, x ==
On 10/28/07, Martin Albrecht <[EMAIL PROTECTED]> wrote:
>
> Hi everybody,
>
> I am working on a talk on SAGE for the RHUL PhD seminar and thus I wondered
> what functionality SAGE implements that was not implemented before in the
> open-source world. By 'implement' I do not mean wrapping some libr
Many thanks William and Mike for recording and
uploading these!
On 11/1/07, William Stein <[EMAIL PROTECTED]> wrote:
>
> Hi,
>
> This is the video from Mike Hansen's talk *today* introducing Sage and
> symmetric functions, etc., during the Univ of Washington combinatorics
> seminar:
>
> http:
On 11/1/07, mabshoff <[EMAIL PROTECTED]> wrote:
>
> I have released 2.8.11.alpha0 at
>
> http://sage.math.washington.edu/home/mabshoff/sage-2.8.11.alpha0.tar
>
> It passes testall on sage.math, but I would like to get some build
> feedback on OSX 10.4, both PPC and Intel flavors, as well as 32 bit
Hi:
A new gap_packages* has been created. Details are at
http://sagetrac.org/sage_trac/ticket/1101
- David Joyner
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pp: In function 'PyObject*
__pyx_tp_new_8morphism_Morphism_QQ_QpCR(PyTypeObject*, PyObject*,
PyObject*)':
sage/rings/padics/morphism.cpp:4301: error: 'struct
__pyx_obj_4sage_10categories_8morphism_Morphism' has no member named
'__pyx_base'
error: command
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