[sage-support] Re: Converting a Singular list to a Sage list
Hi Francisco,
On 5 Jun., 08:26, Simon King simon.k...@uni-jena.de wrote:
Anyway, IMHO it *should* work to do
sage: P*[p.sage_poly(P) for p in I] # not implemented
My fault: Singular has an optional parameter, determining whether a
short or a long polynomial representation is used. So, I should have
done:
sage: singular.eval('ring R')
'ring R;'
sage: singular.eval('short=0') # That's what I forgot to do
'short=0;'
sage: RS = singular('basering')
sage: br = GF(*repr(RS.charstr()).split(','))
sage: br
Finite Field of size 32003
sage: vars = [repr(singular.var(i)) for i in range(1,RS.nvars()+1)]
sage: vars
['x', 'y', 'z']
sage: P = br[tuple(vars)]
sage: I = singular.ideal(['x^2','y*z','z+x'])
sage: I # now it is a long representation: x^2, not x2
x^2,
y*z,
x+z
sage: P*[p.sage_poly(P) for p in I]
Ideal (x^2, y*z, x + z) of Multivariate Polynomial Ring in x, y, z
over Finite Field of size 32003
I think the procedure above should be automated (but the term order
should be taken care of as well, I suppose). I'll open a ticket.
Cheers,
Simon
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[sage-support] Re: Confusion and question about secure switch to Sage notebook.
On Jun 4, 10:37 pm, Chris Seberino cseber...@gmail.com wrote: Notebook documentation mentions a boolean switch called secure for SSL. When I try to turn it on my notebook server, I get an error about a domain Sage needs. How exactly does this switch work and how does Sage want to do SSL? If you turn it on for the first time, sage make its own SSL certificate. The domain name on which the notebook is served (the domain name that the client browser needs to connect to!) is part of that certificate, so that is why Sage asks for the domain. You then just connect to https://... If you already have a certificate that you want Sage to use, hopefully the manual will tell you how to point Sage to the pre-existing cert. In my limited experience, when I want SSL protection, I set up an Apache proxy (mod_proxy) in front of my app running on localhost. Obviously, if Sage's SSL worked that way then Sage would need more info that just toggling a boolean called secure so it must be doing things differently. That is probably possible too, but then you should let Apache take care of the SSL and run the notebook with secure=false behind it. The proxying for connections that are already SSL end-to-end must be very limited, since at that point your Apache proxy is basically a man- in-the-middle. -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Converting a Singular list to a Sage list
Hi Francisco and all other potential reviewers,
On 6 Jun., 08:10, Simon King simon.k...@uni-jena.de wrote:
I think the procedure above should be automated (but the term order
should be taken care of as well, I suppose). I'll open a ticket.
It is #11431, and it seems ready for review. One can convert quite
complicated things with the patch. For example:
sage: singular.eval('ring r10 = (9,a), (x,y,z),lp')
'ring r10 = (9,a), (x,y,z),lp;'
sage: Q = singular('std(ideal(x^2,x+y^2+z^3))',
type='qring')
sage: Q.sage()
Quotient of Multivariate Polynomial Ring in x, y, z over
Finite Field in a of size 3^2 by the ideal (y^4 - y^2*z^3 + z^6, x +
y^2 + z^3)
sage: singular('x^2+y').sage()
x^2 + y
sage: singular('x^2+y').sage().parent()
Quotient of Multivariate Polynomial Ring in x, y, z over
Finite Field in a of size 3^2 by the ideal (y^4 - y^2*z^3 + z^6, x +
y^2 + z^3)
Cheers,
Simon
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[sage-support] Binding Python to HTML/CSS/Javascript
I have a friend who'd like to do as Sage has done: create a Python based service available through web pages. Is there any documentation as to how Sage builds web interfaces driven by a Python backend? FYI The work to be ported is: http://matterandinteractions.org/ Thanks! -- Owen -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Binding Python to HTML/CSS/Javascript
On 6/6/11 10:20 AM, Owen wrote: I have a friend who'd like to do as Sage has done: create a Python based service available through web pages. Is there any documentation as to how Sage builds web interfaces driven by a Python backend? You can look at the sagenb source code and documentation: http://code.google.com/p/sagenb/ You can also look at a simpler project, a python-backed single cell server. This is a work-in-progress, and is in its very early stages: https://github.com/jasongrout/simple-python-db-compute Also, there is an html notebook frontend in the in-progress ipython 0.11. Check the ipython github for the work so far. Codepad also has a python backing: http://codepad.org/ Thanks, Jason -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
Re: [sage-support] Re: Trouble with sage installation on Ubuntu 11.04
I noticed this thread on crypt after compiling sage 4.7 on Mint 11.04 and failing due to this error. I tried compiling the same sage4.7.tar file on Ubuntu 11.04 and was successful. I was wondering. Since Mint is built on top of Ubuntu 11.04, is the fix in sage 4.7 hard coded to recognize Ubuntu 11.04? Could the same fix be expanded so that compiling would succeed on Mint as well? Bill Odefey -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: segmentation fault with SVD
sage: m = random_matrix(RDF, 1000) sage: sage: %time U,s,Vh = m.SVD() Program received signal SIGSEGV, Segmentation fault. 0x7fffec39318d in ATL_dJIK40x40x40TN40x40x0_a1_b1 () from /home/ mate/sage/local/lib/libatlas.so I run Ubuntu mate@ubuntu:~$ uname -a Linux ubuntu 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:24 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux mate@ubuntu:~/sage$ ./sage -version | Sage Version 4.7, Release Date: 2011-05-23 Hmm, I don't get this on several systems I just tried, including Mac Intel, Mac PPC, and a notebook server I have access to running sage: os.uname() 'Linux', 'ws6', '2.6.32-28-generic-pae', '#55-Ubuntu SMP Mon Jan 10 22:34:08 UTC 2011', 'i686' Can someone see if they can replicate this error? -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
Re: [sage-support] Re: Trouble with sage installation on Ubuntu 11.04
Hi Bill, On Mon, Jun 06, 2011 at 09:18:41AM -0700, Bill wrote: I noticed this thread on crypt after compiling sage 4.7 on Mint 11.04 and failing due to this error. I tried compiling the same sage4.7.tar file on Ubuntu 11.04 and was successful. I was wondering. Since Mint is built on top of Ubuntu 11.04, is the fix in sage 4.7 hard coded to recognize Ubuntu 11.04? Could the same fix be expanded so that compiling would succeed on Mint as well? Please type this in a terminal: cat /etc/issue mint-issue.txt And post the file mint-issue.txt back as an attachment. (To get the tabs and spaces just right a text attachment is better.) Regards, Jan -- .~. /V\ Jan Groenewald /( )\www.aims.ac.za ^^-^^ -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
Re: [sage-support] Re: Trouble with sage installation on Ubuntu 11.04
I typed it and nothing hapeened. I guess I do not understand what I am to expect. On Mon, Jun 6, 2011 at 12:00 PM, Jan Groenewald j...@aims.ac.za wrote: Hi Bill, On Mon, Jun 06, 2011 at 09:18:41AM -0700, Bill wrote: I noticed this thread on crypt after compiling sage 4.7 on Mint 11.04 and failing due to this error. I tried compiling the same sage4.7.tar file on Ubuntu 11.04 and was successful. I was wondering. Since Mint is built on top of Ubuntu 11.04, is the fix in sage 4.7 hard coded to recognize Ubuntu 11.04? Could the same fix be expanded so that compiling would succeed on Mint as well? Please type this in a terminal: cat /etc/issue mint-issue.txt And post the file mint-issue.txt back as an attachment. (To get the tabs and spaces just right a text attachment is better.) Regards, Jan -- .~. /V\ Jan Groenewald /( )\www.aims.ac.za ^^-^^ -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Strange error using R pexpect interface?
I'm using R matrices to use an R program and then do things with it in
Sage. For some reason Sage doesn't get the right answer for
matrices above a certain size.
The first one is right (it gives the space that is in the returned
string) while the second one makes no sense; ZZ='' is what actually
comes back. But there is no real reason for this - what's special
about the length? - and doing these in Sage's r_console() gives normal
results for the matrix.
So I feel like pexpect must be doing something naughty. Does anyone
have any ideas what might be going on so I can use more data?
Thanks,
- kcrisman
sage: ZZ = r.eval('matrix(c(1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2,
2, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1,
1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1,
1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 4, 4, 4, 4, 2, 2, 2, 2, 4, 4, 4, 4, 2, 2, 2, 2, 3, 3, 3,
3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 1, 1, 1, 1, 4, 4, 4, 4, 1, 1, 1, 1,
3, 3, 3, 3, 2, 2, 2, 2, 4, 4, 4, 4, 1, 1, 1, 1, 4, 4, 4, 4, 1, 1, 1,
1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 1, 1, 1, 1, 3, 3, 3, 3, 1,
1, 1, 1, 2, 2, 2, 2, 4, 4, 4, 4, 3, 3, 3, 3, 4, 4, 4, 4, 2, 2, 2, 2,
3, 3, 3, 3, 2, 2, 2, 2, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 4, 4, 4, 4,
1),ncol=4)'); ZZ[1]
' '
sage: ZZ = r.eval('matrix(c(1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2,
2, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1,
1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1,
1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 4, 4, 4, 4, 2, 2, 2, 2, 4, 4, 4, 4, 2, 2, 2, 2, 3, 3, 3,
3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 1, 1, 1, 1, 4, 4, 4, 4, 1, 1, 1, 1,
3, 3, 3, 3, 2, 2, 2, 2, 4, 4, 4, 4, 1, 1, 1, 1, 4, 4, 4, 4, 1, 1, 1,
1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 1, 1, 1, 1, 3, 3, 3, 3, 1,
1, 1, 1, 2, 2, 2, 2, 4, 4, 4, 4, 3, 3, 3, 3, 4, 4, 4, 4, 2, 2, 2, 2,
3, 3, 3, 3, 2, 2, 2, 2, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 4, 4, 4, 4, 1,
1, 1, 1, 3),ncol=4)'); ZZ[1]
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Re: [sage-support] Re: Trouble with sage installation on Ubuntu 11.04
HI On Mon, Jun 06, 2011 at 12:22:57PM -0500, William Odefey wrote: I typed it and nothing hapeened. I guess I do not understand what I am to expect. You won't see anything, but you will create the file mint-issue.txt in your home folder. Please post that. Regards, Jan -- .~. /V\ Jan Groenewald /( )\www.aims.ac.za ^^-^^ -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Strange error using R pexpect interface?
On Monday, June 6, 2011 10:54:57 AM UTC-7, kcrisman wrote: I'm using R matrices to use an R program and then do things with it in Sage. For some reason Sage doesn't get the right answer for matrices above a certain size. The first one is right (it gives the space that is in the returned string) while the second one makes no sense; ZZ='' is what actually comes back. But there is no real reason for this - what's special about the length? - and doing these in Sage's r_console() gives normal results for the matrix. So I feel like pexpect must be doing something naughty. Does anyone have any ideas what might be going on so I can use more data? I tried this experiment: I added spaces to the first string to be evaluated. When the string has length = 1024, it seems to work, and when the string has length 1024, it doesn't. For example: sage: s = 'matrix(c(1, 1, 1, 1,' + ' '*987 + '2,2,2,2), ncol=4)' sage: len(s) 1024 sage: r.eval(s) ' [,1] [,2] [,3] [,4]\n[1,]1122\n[2,]11 22' sage: s = 'matrix(c(1, 1, 1, 1,' + ' '*988 + '2,2,2,2), ncol=4)' sage: len(s) 1025 sage: r.eval(s) '' I don't know why, but maybe that can help you track it down. -- John -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Strange error using R pexpect interface?
So I feel like pexpect must be doing something naughty. Does anyone have any ideas what might be going on so I can use more data? I tried this experiment: I added spaces to the first string to be evaluated. When the string has length = 1024, it seems to work, and when the string has length 1024, it doesn't. For example: sage: s = 'matrix(c(1, 1, 1, 1,' + ' '*987 + '2,2,2,2), ncol=4)' sage: len(s) 1024 sage: r.eval(s) ' [,1] [,2] [,3] [,4]\n[1,] 1 1 2 2\n[2,] 1 1 2 2' sage: s = 'matrix(c(1, 1, 1, 1,' + ' '*988 + '2,2,2,2), ncol=4)' sage: len(s) 1025 sage: r.eval(s) '' I don't know why, but maybe that can help you track it down. Thanks - that definitely helps, since pexpect is actually passing strings. At http://pexpect.sourceforge.net/pexpect.html I see The maxread attribute sets the read buffer size. This is maximum number of bytes that Pexpect will try to read from a TTY at one time. Setting the maxread size to 1 will turn off buffering. Setting the maxread value higher may help performance in cases where large amounts of output are read back from the child. Can a pexpect expert help me here? It seems like we have maxread=10 for R (and most other interfaces), which would seem to be plenty of bytes for a 1000-character string, if that is what maxread controls. Doing it in R by hand allows me arbitrarily long things (well, 'by hand' arbitrary) so that is definitely not the bottleneck. And I don't see this problem in Maxima (I am using an older version of Sage without the library interface for Maxima/ECL, so this is a relevant data point). Thanks to anyone! - kcrisman -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Strange error using R pexpect interface?
On Monday, June 6, 2011 12:55:49 PM UTC-7, kcrisman wrote: So I feel like pexpect must be doing something naughty. Does anyone have any ideas what might be going on so I can use more data? I tried this experiment: I added spaces to the first string to be evaluated. When the string has length = 1024, it seems to work, and when the string has length 1024, it doesn't. For example: sage: s = 'matrix(c(1, 1, 1, 1,' + ' '*987 + '2,2,2,2), ncol=4)' sage: len(s) 1024 sage: r.eval(s) ' [,1] [,2] [,3] [,4]\n[1,]1122\n[2,]11 22' sage: s = 'matrix(c(1, 1, 1, 1,' + ' '*988 + '2,2,2,2), ncol=4)' sage: len(s) 1025 sage: r.eval(s) '' I don't know why, but maybe that can help you track it down. Thanks - that definitely helps, since pexpect is actually passing strings. Well, searching for 1024 in r.py results in two hits, and I think the relevant one is # If an input is longer than this number of characters, then # try to switch to outputting to a file. eval_using_file_cutoff=1024) If you input a string longer than 1024 characters, it writes it to a file and then tries to read that file. It looks to me as though the method _read_in_file_command in r.py isn't doing the right thing: the correct string is getting written to the correct file, but then it's not getting imported properly. That is, in expect.py, it's executing this code: try: s = self._eval_line(self._read_in_file_command(tmp_to_use), allow_use_file=False) and it's returning an empty string, even though tmp_to_use is set to the correct file name and that file has the correct contents. I don't know R syntax, so I don't know what's going wrong. -- John -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Incorrect degree on polynomial after ring change
Simon, You're right, and you pointed the way to an easy solution. Thanks for the help. Jeff On Jun 5, 11:46 pm, Simon King simon.k...@uni-jena.de wrote: Hi Jeff, On 6 Jun., 04:33, Jeff Stroomer jstroom...@hotmail.com wrote: M = Matrix([ [ 1, 0, 0, 0], [ 0, 1, 1, 1], [ 0, 0, 1, 0], [ 0, 0, 0, 1], ]) Rt = PolynomialRing(GF(101), order = TermOrder(M), names = 'e, t, x, y') print Rt(g).degree() The first print reports that the degree of g is 7, which is correct, but the second reports the degree is 0. Both answers are correct. In a matrix order, the first row (resp. the first column, AFAIK both conventions appear in the literature) of the matrix provides the degrees of the generators. Here, we have sage: Rt.e,t,x,y = PolynomialRing(GF(101), order = TermOrder(M)) sage: e.degree() 1 sage: t.degree() 0 sage: x.degree() 0 sage: y.degree() 0 Hence, IN THAT RING, x^5-x*y^6 is indeed of degree zero. In the other ring, it is of degree 7. Cheers, Simon -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Strange error using R pexpect interface?
I don't know why, but maybe that can help you track it down. Thanks - that definitely helps, since pexpect is actually passing strings. Well, searching for 1024 in r.py results in two hits, and I think the I don't know why that didn't occur to me. relevant one is The other one seems to be a dud left over from interfaces/gp.py, incidentally. # If an input is longer than this number of characters, then # try to switch to outputting to a file. eval_using_file_cutoff=1024) If you input a string longer than 1024 characters, it writes it to a file and then tries to read that file. It looks to me as though the method _read_in_file_command in r.py isn't doing the right thing: the correct string is getting written to the correct file, but then it's not getting imported properly. That is, in expect.py, it's executing this code: try: s = self._eval_line(self._read_in_file_command(tmp_to_use), allow_use_file=False) and it's returning an empty string, even though tmp_to_use is set to the correct file name and that file has the correct contents. I don't know R syntax, so I don't know what's going wrong. Yeah, I'm investigating this, and somehow we are using source and file not quite correctly. I've been trying a number of variations in the R command line of Sage, and only can get something if I ask for verbose output. source(file=file(/Users/.../.sage//temp/.../48141//interface//tmp48141,open=r),verbose=TRUE) 'envir' chosen:environment: R_GlobalEnv -- parsed 1 expressions; now eval(.)ing them: eval(expression_nr. 1 ) = c(1, 2, 3) curr.fun: symbol c [1] 1 2 3 .. after ‘expression(c(1, 2, 3))’ Hopefully I can track it down relatively quickly.Thank you very much for your help on this. - kcrisman -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
[sage-support] Re: Strange error using R pexpect interface?
This is now http://trac.sagemath.org/sage_trac/ticket/11436. -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
