A nifty service provided by some of the Ma* folks are webspaces where
users could upload some powerful research-level. For example:
* Mathematica: http://library.wolfram.com/
* Matlab: http://www.mathworks.com/matlabcentral/fileexchange/
* Maple:
http://www.maplesoft.com/support/help/Maple/view.a
> However I disagree a little here about the degree of zero polynomial.
> I would expect SylvesterMatrix(x^2, 0)
>
> To be
>
> [0 0]
> [0 0]
Why do you expect that? What definition are you using for the Sylvester Matrix?
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On Nov 11, 11:39 am, Eviatar wrote:
> Yes, but can you go directly from base 2 to base 4, for example? I
> guess this would work, ZZ(23,base=2).str(base=4), but it's not very
> convenient.
sage: ZZ([1, 2], base=3)
7
sage: ZZ([1, 2], base=3).digits(2)
[1, 1, 1]
My opinion is that this is short
Yes, but can you go directly from base 2 to base 4, for example? I
guess this would work, ZZ(23,base=2).str(base=4), but it's not very
convenient.
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On Nov 12, 2:00 am, Jeroen Demeyer wrote:
> On 2010-11-11 18:43, Dima Pasechnik wrote:
>
> > No. GPLv2+ - compatibility is a weaker requirement than the GPLv2 -
> > compatibility.
> > Just as x>=2 is weaker than x=2.
>
> Probably we are using the word "compatibility" in a different way.
> Essent
On 2010-11-11 18:43, Dima Pasechnik wrote:
> No. GPLv2+ - compatibility is a weaker requirement than the GPLv2 -
> compatibility.
> Just as x>=2 is weaker than x=2.
Probably we are using the word "compatibility" in a different way.
Essentially what I wanted to say is the following:
If Sage claims
On Nov 11, 6:52 pm, Tom Boothby wrote:
> The empty matrix is NOT the Sylvester matrix of (0,0), (0,1) or (1,0).
>
> The degree of the zero polynomial is usually taken to be -infinity,
> though Sage uses -1 for some reason. In either case, the Sylvester
> matrix needs to have negative dimensions
The empty matrix is NOT the Sylvester matrix of (0,0), (0,1) or (1,0).
The degree of the zero polynomial is usually taken to be -infinity,
though Sage uses -1 for some reason. In either case, the Sylvester
matrix needs to have negative dimensions.
That is to say, return a ValueError in these cas
On Nov 12, 12:27 am, Jeroen Demeyer wrote:
> On 2010-11-11 17:21, Dima Pasechnik wrote:
>
> > On Nov 11, 7:20 pm, Jeroen Demeyer wrote:
> >> On 2010-11-11 11:53, Dr. David Kirkby wrote:
>
> >>> The license must be a GPL version v2+ compatible license.
>
> >> Note that GPLv3 is NOT compaible wit
Hi,
I am trying to write a procedure for univariate and multivariate
polynomial rings that computes the Sylvester matrix of two
polynomials. But I have a problem with corner cases.
I am not sure what the method should resurn in the cases
poly1, poly2 = 0, 1
poly1, poly2 = 1, 0
poly1, poly2 = 0,
I was playing with sageexample environment, didn't quite like what I
was getting (compared to what I planned), and while I was figuring out
a way to suggest a new environment, I found out that Volker has
already timely produced sagecommandline, which made me very happy.
However, after seeing what
On Nov 11, 10:13 am, Eviatar wrote:
> Thank you,
>
> I wasn't aware of that functionality. However, I think my function is
> more convenient since you can directly convert bases, instead of using
> base 10 as an intermediary step.
sage: ZZ(15).digits(2)
[1, 1, 1, 1]
sage: ZZ(15).digits(3)
[0, 2
On 11/11/10 10:32 AM, John H Palmieri wrote:
On Nov 11, 8:20 am, Jason Grout wrote:
One of my interacts for class is segfaulting in 4.6, but worked fine in
4.5.2. The problem is illustrated below:
sage: V=(QQ^2).span_of_basis([[1,1]])
sage: v=V([1,1])
sage: x=sqrt(2)*v
sage: 3*x
Thank you,
I wasn't aware of that functionality. However, I think my function is
more convenient since you can directly convert bases, instead of using
base 10 as an intermediary step.
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On Thu, Nov 11, 2010 at 6:37 AM, Dr. David Kirkby
wrote:
> On 11/11/10 01:32 PM, Jason Grout wrote:
>
>
>> As I understand it, currently, the whole Sage distribution is
>> effectively GPLv3+, since it combines GPLv2+ and GPLv3+ code, so it is
>> at least GPLv3. My understanding is that we currentl
On 11/11/10 04:27 PM, Jeroen Demeyer wrote:
That's even worse in terms of compatibility (because then the licence
must be compatible with GPLv2 and also with future versions of the GPL).
So if code is not compatible with GPLv2, it certainly will not be
compatible with GPLv2+.
This in fact rai
On Nov 11, 11:27 am, Jeroen Demeyer wrote:
> On 2010-11-11 17:21, Dima Pasechnik wrote:
>
> > On Nov 11, 7:20 pm, Jeroen Demeyer wrote:
> >> On 2010-11-11 11:53, Dr. David Kirkby wrote:
>
> >>> The license must be a GPL version v2+ compatible license.
>
> >> Note that GPLv3 is NOT compaible wit
On Nov 11, 8:20 am, Jason Grout wrote:
> One of my interacts for class is segfaulting in 4.6, but worked fine in
> 4.5.2. The problem is illustrated below:
>
> sage: V=(QQ^2).span_of_basis([[1,1]])
> sage: v=V([1,1])
> sage: x=sqrt(2)*v
> sage: 3*x
>
>
On 2010-11-11 17:21, Dima Pasechnik wrote:
> On Nov 11, 7:20 pm, Jeroen Demeyer wrote:
>> On 2010-11-11 11:53, Dr. David Kirkby wrote:
>>
>>> The license must be a GPL version v2+ compatible license.
>>
>> Note that GPLv3 is NOT compaible with GPLv2! I quote
>> fromhttp://www.gnu.org/licenses/li
> import os
> os.uname()[4]
> > 'Power Macintosh'
> os.uname()[0]
> > 'Darwin'
>
> > What is it on Intel? On 10.4 PPC?
>
Same on 10.4 PPC.
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On Nov 11, 7:20 pm, Jeroen Demeyer wrote:
> On 2010-11-11 11:53, Dr. David Kirkby wrote:
>
> > The license must be a GPL version v2+ compatible license.
>
> Note that GPLv3 is NOT compaible with GPLv2! I quote
> fromhttp://www.gnu.org/licenses/license-list.html#GNUGPL
but we talk about GPLv2+
One of my interacts for class is segfaulting in 4.6, but worked fine in
4.5.2. The problem is illustrated below:
sage: V=(QQ^2).span_of_basis([[1,1]])
sage: v=V([1,1])
sage: x=sqrt(2)*v
sage: 3*x
Unhandled SIGSEGV: A segmentation fa
On 11/11/10 03:49 PM, Dima Pasechnik wrote:
Could anyone tell me whether we build libatlas and libcblas on MacOSX
Intel (and place them in SAGE_LOCAL/lib)?
I know this is not the case on PPC.
ATLAS, it is not built on OS X at all.
There's a really small python script (spkg-install) which calls
I was just looking at a file in Sage, which lists the dependencies for ECL:. It
has:
$(INST)/$(ECL): $(BASE) $(INST)/$(MPIR) $(INST)/$(TERMCAP) \
$(INST)/$(READLINE) $(INST)/$(BOEHM_GC)
which means ECL does not start building until after both readline and termcap
are built. Is
Could anyone tell me whether we build libatlas and libcblas on MacOSX
Intel (and place them in SAGE_LOCAL/lib)?
I know this is not the case on PPC.
I am working on setup.py for CVXOPT that might be dependent upon
this.
I would also appreciate knowing how to dig up the hardware version. On
my MacO
On 11/11/10 01:32 PM, Jason Grout wrote:
As I understand it, currently, the whole Sage distribution is
effectively GPLv3+, since it combines GPLv2+ and GPLv3+ code, so it is
at least GPLv3. My understanding is that we currently can't include GPL2
(not +) code. However, if someone wanted to take
On 11/11/10 01:41 PM, Dima Pasechnik wrote:
Dave,
can you get us curl or wget on t2?
hg can wait, as you can just install sage system-wide and make hg an
alias to "sage -hg"
Thanks,
Dima
wget is in /usr/sfw/bin, and that should be in your path if you add
if [ `uname -n` = t2 ] ; then
. /
Dave,
can you get us curl or wget on t2?
hg can wait, as you can just install sage system-wide and make hg an
alias to "sage -hg"
Thanks,
Dima
On Nov 11, 9:13 pm, "Dr. David Kirkby"
wrote:
> On 11/11/10 12:54 PM, Simon King wrote:
>
>
>
>
>
> > Hi David,
>
> > On 11 Nov., 12:24, "Dr. David Kirk
Hi David,
On 11 Nov., 14:13, "Dr. David Kirkby" wrote:
> It seems that bash is reading .bashrc and not .profile, as you have a .bashrc
> file. I just appended
>
> if [ `uname -n` = t2 ] ; then
> . /usr/local/bin/t2-setup
> fi
>
> to the end of your .bashrc file, and it then sets your PATH co
On 11/11/10 6:44 AM, Dr. David Kirkby wrote:
On 11/11/10 12:07 PM, Jeroen Demeyer wrote:
On 2010-11-11 12:42, Dr. David Kirkby wrote:
My interpretation of that is if:
* Says GPL 2
then's it incompatible. But if
I suppose you mean "if it says GPL 3 it is incompatible" (which the GLPK
and the
On 11/11/10 12:54 PM, Simon King wrote:
Hi David,
On 11 Nov., 12:24, "Dr. David Kirkby" wrote:
I've now set up t2.math so it is able to build Sage again. The software I've
added includes
* gcc 4.5.1
* emacs 23.2
* vim 7.3 (vi clone, but handles big files better than vi)
* screen 4
Hi David,
On 11 Nov., 12:24, "Dr. David Kirkby" wrote:
> I've now set up t2.math so it is able to build Sage again. The software I've
> added includes
>
> * gcc 4.5.1
> * emacs 23.2
> * vim 7.3 (vi clone, but handles big files better than vi)
> * screen 4.00.03
>
> Please add something li
On 11/11/10 12:07 PM, Jeroen Demeyer wrote:
On 2010-11-11 12:42, Dr. David Kirkby wrote:
My interpretation of that is if:
* Says GPL 2
then's it incompatible. But if
I suppose you mean "if it says GPL 3 it is incompatible" (which the GLPK
and the new CVXOPT package says)
No, I don't mean th
On 2010-11-11 12:42, Dr. David Kirkby wrote:
> My interpretation of that is if:
>
> * Says GPL 2
>
> then's it incompatible. But if
I suppose you mean "if it says GPL 3 it is incompatible" (which the GLPK
and the new CVXOPT package says)
> This really is a minefield.
Unfortunately it is...
Jer
On 11/11/10 11:20 AM, Jeroen Demeyer wrote:
On 2010-11-11 11:53, Dr. David Kirkby wrote:
The license must be a GPL version v2+ compatible license.
Note that GPLv3 is NOT compaible with GPLv2! I quote from
http://www.gnu.org/licenses/license-list.html#GNUGPL
As I understand it, the bit of GP
Following the recent changes made to the server disk.math, the Solaris 10
machine t2.math was unable to build Sage, as it relied on some external NFS
shares which are no longer exist.
I've now set up t2.math so it is able to build Sage again. The software I've
added includes
* gcc 4.5.1
*
On 2010-11-11 11:53, Dr. David Kirkby wrote:
> The license must be a GPL version v2+ compatible license.
Note that GPLv3 is NOT compaible with GPLv2! I quote from
http://www.gnu.org/licenses/license-list.html#GNUGPL
Please note that GPLv3 is not compatible with GPLv2 by itself. However,
most sof
In the section of the Sage Developers guide
http://www.sagemath.org/doc/developer/inclusion.html
there is this one sentence.
"License. The license must be a GPL version 2+ compatible license."
Is that sufficient, or should that section be expanded? The question was raised
by Dima on http://t
On 11/11/10 2:11 AM, Jason Grout wrote:
If it helps, here is the backtrace using sage -gdb:
http://sage.pastebin.com/w7sidQy4
(further details on trac #10250)
Thanks,
Jason
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If it helps, here is the backtrace using sage -gdb:
http://sage.pastebin.com/w7sidQy4
Thanks,
Jason
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For more options, visit this
This code worked in Sage 4.5.2. I just realized that it now gives a
segfault in 4.6. Does anyone know what is going on?
sage: A=matrix(QQ, [[2,1],[0,3]])
sage: eval, evecs,mult=A.eigenvectors_right()[0]
sage: evec=evecs[0]
sage: unitevec=evec/evec.norm()
sage: unitevec
(1/2*sqrt(2), 1/2*sqrt(
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