Re: [sage-devel] MathJax limit for TeX expression in notebook

2015-06-01 Thread Thierry 
Hi,

see http://trac.sagemath.org/ticket/18577

Could you please tell if it fixes your real-life examples (both in sagenb
and ipython notebooks) ?

Ciao,
Thierry



On Mon, Jun 01, 2015 at 02:57:19AM -0700, Michal Bejger wrote:
> Hi Thierry, 
> 
> Using SageManifolds, I can produce long equations quite easily - for 
> testing 
> I also decreased the value of MAXBUFFER in 
> $SAGE_ROOT/local/share/mathjax/config/TeX-AMS_HTML-full.js 
> (javascript file used by ipython notebook) from 5*1024 to 128. Then I have 
> 
> %display latex
> M = Manifold(2,'M')
> X. = M.chart()
> h = M.scalar_field(function('h',x,y))
> dh = h.differential()
> dh.display() # works 
> 
> (dh*dh).display() # is too long and not rendered properly 
> 
> Btw. I'm a little baffled at the moment, because the following works fine 
> 
> m = matrix(QQ, 16, 16, lambda i, j: i+j)
> latex(m)
> 
>  Cheers, 
> 
>  Michał 
> 
> 
> On Sunday, May 31, 2015 at 5:40:28 PM UTC+2, Thierry (sage-googlesucks@xxx) 
> wrote:
> >
> > Hi, 
> >
> > it is doable, especially since the bound on MAXBUFFER seems to aim only at 
> > avoiding infinite loops. 
> >
> > Could you please send an easy way to produce such huge formula in Sage so 
> > that i can test further ? 
> >
> > Ciao, 
> > Thierry 
> >
> >
> >
> > On Thu, May 28, 2015 at 02:21:01PM -0700, Michal Bejger wrote: 
> > > Dear Sage Devs, 
> > > 
> > > I have a question related to the limited length of a TeX expression 
> > > rendered by MathJax in the notebook - the variable responsible 
> > > for it is MAXBUFFER [1], and its default value is 5*1024 (5KB), 
> > > which in most cases is quite all right but sometimes, for example 
> > > when printing tensor components in SageManifolds 
> > > (sagemanifolds.obspm.fr), it's not enough. 
> > > 
> > > Is it possible to pass a MathJax preamble in the notebook? 
> > > Or alternatively, can we have MAXBUFFER increased in Sage 
> > > local/share/mathjax/config/TeX-AMS_HTML-full.js default configuration? 
> > > 
> > >  Best regards, 
> > > 
> > >  Michał 
> > > 
> > > [1] http://docs.mathjax.org/en/latest/options/TeX.html 
> > > 
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> >
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Re: [sage-devel] Full-time Sage developer position opening at Université Paris-Sud for Fall 2015

2015-06-01 Thread William Stein 
On Monday, June 1, 2015, Nicolas M. Thiery  wrote:

> Dear Sage developers,
>
> This is a preliminary announcement for a full time Sage developer
> position


... the first such position ever! :-)




> opening at Université Paris-Sud, funded by OpenDreamKit:
>
>   http://opendreamkit.org/2015/05/22/developer-position-paris-sud/
>
> A formal announcement will be posted there in the coming days, in
> particular with a specific timeline. For now we hope to run interviews
> at the end of June, for a recruitment in early Fall 2015 and for up to
> four years.
>
> A second full-time developper will be hired at Université Paris-Sud,
> presumably in Fall 2016.
>
> Please forward this announcement where you see appropriate,
>
> Looking forward candidates!
> Nicolas
> --
> Nicolas M. Thiéry "Isil" >
> http://Nicolas.Thiery.name/
>
> --
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[sage-devel] Build problem of zeromq-4.0.5 on 32-bit SPARC processor running Solaris.

2015-06-01 Thread Dr. David Kirkby (Kirkby Microwave Ltd) 
After my recent failure to build Sage with the gcc on my system
(4.5.0), I tried to use Sage's built in gcc (4.9.2), which worked
until it tried to build the package zeromq-4.0.5, which I think is a
standard package added since I last built Sage on Solaris.  I believe
this is an upstream bug, and have reported it to Martin Sustrik
sust...@250bpm.com

I created a trac ticket

http://trac.sagemath.org/ticket/18576

This is the build log.


drkirkby@buzzard:~/sage-6.7/logs/pkgs$ cat zeromq-4.0.5.log
Found local metadata for zeromq-4.0.5
Found local sources at
/export/home/drkirkby/sage-6.7/upstream/zeromq-4.0.5.tar.gz
/export/home/drkirkby/sage-6.7/src/bin/sage-spkg: line 101: command:
shasum: not found
/export/home/drkirkby/sage-6.7/src/bin/sage-spkg: line 104: command:
md5sum: not found
/export/home/drkirkby/sage-6.7/src/bin/sage-spkg: line 107: command:
md5: not found
Checksum: 667919094 vs 667919094
zeromq-4.0.5

Setting up build directory for zeromq-4.0.5
Finished set up

Host system:
SunOS buzzard 5.10 Generic sun4u sparc SUNW,Sun-Blade-1000

C compiler: gcc
C compiler version:
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/export/home/drkirkby/sage-6.7/local/libexec/gcc/sparc-sun-solaris2.10/4.9.2/lto-wrapper
Target: sparc-sun-solaris2.10
Configured with: ../src/configure
--prefix=/export/home/drkirkby/sage-6.7/local
--with-local-prefix=/export/home/drkirkby/sage-6.7/local
--with-gmp=/export/home/drkirkby/sage-6.7/local
--with-mpfr=/export/home/drkirkby/sage-6.7/local
--with-mpc=/export/home/drkirkby/sage-6.7/local --with-system-zlib
--disable-multilib --disable-nls --enable-languages=c,c++,fortran
--disable-libitm --with-as=/usr/ccs/bin/as --with-ld=/usr/ccs/bin/ld
Thread model: posix
gcc version 4.9.2 (GCC)

patching file tools/curve_keygen.c
patching file tools/curve_keygen.cpp
patching file tools/Makefile.am
patching file tools/Makefile.in
patching file configure.ac
patching file src/Makefile.am
patching file configure
Hunk #1 succeeded at 623 (offset -20 lines).
Hunk #2 succeeded at 17631 (offset -12 lines).
Hunk #3 succeeded at 19842 (offset -14 lines).
Hunk #4 succeeded at 20324 (offset -22 lines).
patching file src/Makefile.in
Hunk #1 succeeded at 472 (offset -32 lines).
checking for a BSD-compatible install... config/install-sh -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... config/install-sh -c -d
checking for gawk... no
checking for mawk... no
checking for nawk... nawk
checking whether make sets $(MAKE)... yes
checking how to create a ustar tar archive... gnutar
checking whether make supports nested variables... yes
checking for gcc... gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables...
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking for style of include used by make... GNU
checking dependency style of gcc... gcc3
checking for gcc option to accept ISO C99... -std=gnu99
checking whether we are using the GNU C++ compiler... yes
checking whether g++ accepts -g... yes
checking dependency style of g++... gcc3
checking whether gcc -std=gnu99 and cc understand -c and -o together... yes
checking for a sed that does not truncate output... /usr/bin/sed
checking for gawk... (cached) nawk
checking for xmlto... no
checking for asciidoc... no
checking build system type... sparc-sun-solaris2.10
checking host system type... sparc-sun-solaris2.10
checking how to print strings... printf
checking for a sed that does not truncate output... (cached) /usr/bin/sed
checking for grep that handles long lines and -e... /usr/sfw/bin/ggrep
checking for egrep... /usr/sfw/bin/ggrep -E
checking for fgrep... /usr/sfw/bin/ggrep -F
checking for ld used by gcc -std=gnu99... /usr/ccs/bin/ld
checking if the linker (/usr/ccs/bin/ld) is GNU ld... no
checking for BSD- or MS-compatible name lister (nm)... /usr/ccs/bin/nm -p
checking the name lister (/usr/ccs/bin/nm -p) interface... BSD nm
checking whether ln -s works... yes
checking the maximum length of command line arguments... 786240
checking whether the shell understands some XSI constructs... yes
checking whether the shell understands "+="... no
checking how to convert sparc-sun-solaris2.10 file names to
sparc-sun-solaris2.10 format... func_convert_file_noop
checking how to convert sparc-sun-solaris2.10 file names to toolchain
format... func_convert_file_noop
checking for /usr/ccs/bin/ld option to reload object files... -r
checking for objdump... objdump
checking how to recognize dependent libraries... pass_all
checking for dlltool

[sage-devel] Re: "The SageMath Foundation"

2015-06-01 Thread Dima Pasechnik 


On Monday, 1 June 2015 14:22:47 UTC+1, kcrisman wrote:
>
>
>> What is the goal of this organization and the relationship with the 
>> organization that runs SMC? Perhaps a question to the lawyers about the 
>> coexistence of the two organizations might be a good idea? 
>>
>
> I think that is a very good question, and also I think a question that 
> very often comes up when companies have charitable organizations affiliated 
> with them (this would in some sense be the reverse) so probably a question 
> that has well-defined answers, at least in the USA.
>
> I also note that a number of people have asked in the past about whether a 
> US or European or other foundation would be best (e.g. for granting 
> purposes), or possibly multiple such - I have no particular opinion on 
> that, but wanted to remind of those discussions.  It would be worth talking 
> to R or GAP or other folks on this, perhaps.
>
 
There is nothing like this in existence as far as GAP is concerned.



 

> - kcrisman
>

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[sage-devel] Full-time Sage developer position opening at Université Paris-Sud for Fall 2015

2015-06-01 Thread Nicolas M. Thiery 
Dear Sage developers,

This is a preliminary announcement for a full time Sage developer
position opening at Université Paris-Sud, funded by OpenDreamKit:

  http://opendreamkit.org/2015/05/22/developer-position-paris-sud/

A formal announcement will be posted there in the coming days, in
particular with a specific timeline. For now we hope to run interviews
at the end of June, for a recruitment in early Fall 2015 and for up to
four years.

A second full-time developper will be hired at Université Paris-Sud,
presumably in Fall 2016.

Please forward this announcement where you see appropriate,

Looking forward candidates!
Nicolas
--
Nicolas M. Thiéry "Isil" 
http://Nicolas.Thiery.name/

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Re: [sage-devel] Re: "The SageMath Foundation"

2015-06-01 Thread William Stein 
On Mon, Jun 1, 2015 at 6:22 AM, kcrisman  wrote:
>>
>> What is the goal of this organization and the relationship with the
>> organization that runs SMC? Perhaps a question to the lawyers about the
>> coexistence of the two organizations might be a good idea?
>
>
> I think that is a very good question, and also I think a question that very
> often comes up when companies have charitable organizations affiliated with
> them (this would in some sense be the reverse) so probably a question that
> has well-defined answers, at least in the USA.

I find these questions vague.  However, the law is that the 501c3
can't do things that
financially benefit SageMath, Inc. or individuals.  However, SageMath,
Inc. could donate
money or time to the 501c3 and get a small tax reduction and be able
to more clearly
indicate to the community who profit is being donated to support
software development.

> I also note that a number of people have asked in the past about whether a
> US or European or other foundation would be best (e.g. for granting
> purposes), or possibly multiple such - I have no particular opinion on that,
> but wanted to remind of those discussions.  It would be worth talking to R
> or GAP or other folks on this, perhaps.

People are have not been falling over themselves competing to start such things.
I think Harald told me there is one R Foundation in the world, and it
surprisingly happens
to be in Austria (where he is from).

>
> - kcrisman
>
> --
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Re: [sage-devel] "The SageMath Foundation"

2015-06-01 Thread William Stein 
On Mon, Jun 1, 2015 at 4:30 AM, Franco Saliola  wrote:
> Hey William,
>
> What is the goal of this organization and the relationship with the 
> organization that runs SMC?

That is the nontrivial question.  It's what a lot of the application
to the IRS for 501c3 status would be about.

> Perhaps a question to the lawyers about the coexistence of the two 
> organizations might be a good idea?


> Franco
>
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Re: [sage-devel] Re: what needs deprecation?

2015-06-01 Thread William Stein 
On Mon, Jun 1, 2015 at 2:03 PM, Nicolas M. Thiery
 wrote:
> On Sun, May 24, 2015 at 06:31:42AM -0700, Volker Braun wrote:
>>Something that is not imported by default is, by definition, an
>>implementation detail. Its either private or public, but not both. That
>>leaves us with
>>POLL:
>>[ ] Only deprecate public interfaces
>>[ ] There are not enough discussions on trac (tickets are reviewed too
>>quickly), we should discuss which private methods need to be deprecated
>>on a case-by-case basis.
>>[ ] Always require one year of deprecation for any change, regardless
>>of public or private interfaces.
>
> I am not quite sure about "what's imported by default" == "public
> interface". It feels more like to me "what's used by many Sage users
> and convenient to have under the fingertip". But then, I agree that we
> don't have a formal definition of what's public interface or not.

I have always viewed the public interface of a Python module to be the
set of classes and functions that are not private, i.e., do not start
with an underscore.  In C++/Java this distinction is even clearer
since the word "public" (and "private") explicitly appears.

Quoting straight from the Python docs [1]: " However, there is a
convention that is followed by most Python code: a name prefixed with
an underscore (e.g. _spam) should be treated as a non-public part of
the API (whether it is a function, a method or a data member). It
should be considered an implementation detail and subject to change
without notice."   This means to me that something that doesn't start
with an underscore is *not* "a non-public part of the API", i.e., it
*is* public.

Using this definition is completely unambiguous, as compared to your
"what people use" or Volker's what's polluted the global namespace on
startup...

[1] https://docs.python.org/2/tutorial/classes.html

William


>
> For the poll itself, I'd suggest something like: "it's not formally
> required to deprecate features that are not imported by default;
> however, if someone has a strong enough feeling about it (e.g. from
> seeing users code around him) to be willing to take the time to
> implement it, let's not prevent her/him from doing so.
>
> Cheers,
> Nicolas
> --
> Nicolas M. Thiéry "Isil" 
> http://Nicolas.Thiery.name/
>
> --
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Re: [sage-devel] Re: what needs deprecation?

2015-06-01 Thread Nicolas M. Thiery 
On Sun, May 24, 2015 at 06:31:42AM -0700, Volker Braun wrote:
>Something that is not imported by default is, by definition, an
>implementation detail. Its either private or public, but not both. That
>leaves us with
>POLL:
>[ ] Only deprecate public interfaces
>[ ] There are not enough discussions on trac (tickets are reviewed too
>quickly), we should discuss which private methods need to be deprecated
>on a case-by-case basis.
>[ ] Always require one year of deprecation for any change, regardless
>of public or private interfaces.

I am not quite sure about "what's imported by default" == "public
interface". It feels more like to me "what's used by many Sage users
and convenient to have under the fingertip". But then, I agree that we
don't have a formal definition of what's public interface or not.

For the poll itself, I'd suggest something like: "it's not formally
required to deprecate features that are not imported by default;
however, if someone has a strong enough feeling about it (e.g. from
seeing users code around him) to be willing to take the time to
implement it, let's not prevent her/him from doing so.

Cheers,
Nicolas
--
Nicolas M. Thiéry "Isil" 
http://Nicolas.Thiery.name/

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Re: [sage-devel] sequences in SageMath

2015-06-01 Thread William Stein 
On Mon, Jun 1, 2015 at 2:49 AM, Daniel Krenn  wrote:
> Dear all,
>
> similar to
> graphs.some_graph
> or to
> codes.some_code
> (and similar), I propose to introduce
> sequences.some_sequence
> which should provide a unified access point to all possible sequences in
> SageMath. For example, there is fibonacci_sequence in
> sage.combinat.combinat, binary_recurring_sequence (somewhere in
> combinat) and various other code.


Also there is sloane.[tab] with sloane sequences

>
> One motivation for creating this, is to include here many sequences,
> which can be calculated term-by-term (from the previously calculated
> ones, i.e., recursively) or where the first N terms can be calculated at
> once efficiently.
> Nevertheless, it can also provide an interface to sequences, where each
> term can be calculated explicitly (without dealing with the previous ones).
>
> This posting is to discuss this new feature at this early stage (see
> trac ticket #18565 [1] for a draft).
>
> - In this draft, all sequences are iterator/generator expressions
> (finite or maybe infinite). This is to keep it simple. [*]
> What do you think about this?
>
> - At the moment this module is in sage.combinat. Another option would be
> to create sage.sequences and put it there. Any opinions on this?
>
> - In the trac ticket, the function fibonacci_sequence will be
> deprecated, since this is then sequence.fibonacci(...). I am also happy
> not to deprecate it and keep it as it is (only changing the code to
> avoid code duplication)
>
> - I found a function fibonacci_xrange. It is completly unclear (to me)
> from the name, what this function does (in particular, why "xrange" (and
> not a simple "range"). For this reason, I propose to deprecate this
> function (an alternative with the new sequences-interface is provided).
>
> - Should the oeis-functionality be included in some way (at some point)?
> At the moment
> iter(oeis(...).first_terms())
> comes closest.
>
> Best wishes
>
> Daniel
>
> [1] http://trac.sagemath.org/ticket/18565
>
> [*] An alternative would be to create a class and do it in a similar way
> as sage.combinat.words.Word (of course in this case much more has to be
> done than now; (common base-class for words/sequences?!? ...not sure
> what to think about this...)).
>
> --
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Re: [sage-devel] Re: dpkg: error processing package sagemath-upstream-binary (--configure):

2015-06-01 Thread Jan Groenewald 
Yes, thank you for the correction.

We will announce here when to unhold and are working on it constantly.

Regards,
Jan

On 1 June 2015 at 19:51, Chris Caldwell  wrote:

>
>
> On Saturday, May 30, 2015 at 9:15:05 AM UTC-5, Jan Groenewald wrote:
>>
>> wget
>> https://launchpad.net/~aims/+archive/ubuntu/sagemath/+build/7362961/+files/sagemath-upstream-binary_6.6ppa1_amd64.deb
>> 
>> sudo dpkg -i
>> https://launchpad.net/~aims/+archive/ubuntu/sagemath/+build/7362961/+files/sagemath-upstream-binary_6.6ppa1_amd64.deb
>> 
>> sudo apt-mark hold sagemath-upstream-binary
>>
>
>  Should the middle line be
>
> sudo dpkg -i sagemath-upstream-binary_6.6ppa1_amd64.deb
> 
>
> How will I know when unhold?
>
> --
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-- 
  .~.
  /V\ Jan Groenewald
 /( )\www.aims.ac.za
 ^^-^^

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Re: [sage-devel] Re: dpkg: error processing package sagemath-upstream-binary (--configure):

2015-06-01 Thread Chris Caldwell 


On Saturday, May 30, 2015 at 9:15:05 AM UTC-5, Jan Groenewald wrote:
>
> wget 
> https://launchpad.net/~aims/+archive/ubuntu/sagemath/+build/7362961/+files/sagemath-upstream-binary_6.6ppa1_amd64.deb
>  
> 
> sudo dpkg -i 
> https://launchpad.net/~aims/+archive/ubuntu/sagemath/+build/7362961/+files/sagemath-upstream-binary_6.6ppa1_amd64.deb
>  
> 
> sudo apt-mark hold sagemath-upstream-binary
>

 Should the middle line be 

sudo dpkg -i sagemath-upstream-binary_6.6ppa1_amd64.deb 


How will I know when unhold?

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Re: [sage-devel] Re: dpkg: error processing package sagemath-upstream-binary (--configure):

2015-06-01 Thread Rob Beezer 
Not sure of this will help, but I did a fresh build of 6.8.beta2 on 
SageMathCloud, passed long tests, and changed the directory name.  Usually 
this is OK and the paths all get adjusted but now I get:

~/sage-dev$ ./sage
find: 
`/projects/53b77207-8614-4086-a032-432af4b4cdbd/sage-dev/local/var/lib/sage/installed':
 
No such file or directo
ry
┌┐
│ SageMath Version 6.8.beta2, Release Date: 2015-05-29   │
│ Type "notebook()" for the browser-based notebook interface.│
│ Type "help()" for help.│
└┘
┏┓
┃ Warning: this is a prerelease version, and it may be unstable. ┃
┗┛
The Sage installation tree has moved
from 
/projects/53b77207-8614-4086-a032-432af4b4cdbd/sage-dev-images/sage-6.8.beta2
  to /projects/53b77207-8614-4086-a032-432af4b4cdbd/sage-dev
Updating various hardcoded paths...
(Please wait at most a few minutes.)
DO NOT INTERRUPT THIS.
Done updating paths.
Traceback (most recent call last):
  File 
"/projects/53b77207-8614-4086-a032-432af4b4cdbd/sage-dev/local/bin/sage-ipython",
 
line 7, in 
from sage.repl.interpreter import SageTerminalApp
  File 
"/projects/53b77207-8614-4086-a032-432af4b4cdbd/sage-dev/local/lib/python2.7/site-packages/sage/__init__.py",
line 3, in 
from sage.repl.ipython_extension import load_ipython_extension
ImportError: No module named repl.ipython_extension

Rob

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Re: [sage-devel] Re: Memory leak? Creation of DiGraph slows down.

2015-06-01 Thread Travis Scrimshaw 


> Why it doesn't just check if dot2tex has been installed as an optional 
> package? 
>

Because one also needs an installation of graphviz as well (which is an 
experimental package, but a system-wide installation is what is recommended 
and typically used).

>
> Or should Sage be able to use system-wide dot2tex also? 
>

In short, yes, but the big issue is graphviz. 

>
> In any case, something should be done. Who will make a ticket? 
>
> This is http://trac.sagemath.org/ticket/18570 (needs review).
 
Best,
Travis

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[sage-devel] Re: "The SageMath Foundation"

2015-06-01 Thread Harald Schilly 
+1 from my side to setting this up and I'm happy to help if possible.

On Monday, June 1, 2015 at 3:22:47 PM UTC+2, kcrisman wrote:
> or European or other foundation would be best (e.g. for granting 
purposes), or possibly multiple such - 

I have year old plans to create a Sage foundation in Austria. So far, there 
hasn't been enough traction to actually start it, but it's not that hard. 
What's required is a small group of committed persons to start it. Contact 
me if you want to help :-)

And since you mention R, they are setup as an Austrian NPO.

-- harald

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Re: [sage-devel] Re: 404 Error: page not found

2015-06-01 Thread Harald Schilly 


On Wednesday, May 27, 2015 at 2:05:10 PM UTC+2, Nathann Cohen wrote:
>
> > Has this historical data now just disappeared? 
>

The ticket is here

https://github.com/sagemath/website/issues/14

 

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Re: [sage-devel] Re: Memory leak? Creation of DiGraph slows down.

2015-06-01 Thread Nathann Cohen 
> Why it doesn't just check if dot2tex has been installed as an optional
> package?
>
> Or should Sage be able to use system-wide dot2tex also?
>
> In any case, something should be done. Who will make a ticket?

You can. Ticket 18124 was created recently, but it is not immediately
related (it may conflict, though).

Nathann

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Re: [sage-devel] Re: Memory leak? Creation of DiGraph slows down.

2015-06-01 Thread Jori Mäntysalo 

On Sat, 30 May 2015, Travis Scrimshaw wrote:


So it seems to come from the have_dot2tex() function, in that it tests the
installation of dot2tex by executing a dot2tex command. I think the easiest
and best solution would be to make have_dot2tex() into a @cached_function.


Why it doesn't just check if dot2tex has been installed as an optional 
package?


Or should Sage be able to use system-wide dot2tex also?

In any case, something should be done. Who will make a ticket?

--
Jori Mäntysalo

[sage-devel] Re: "The SageMath Foundation"

2015-06-01 Thread kcrisman 

>
>
> What is the goal of this organization and the relationship with the 
> organization that runs SMC? Perhaps a question to the lawyers about the 
> coexistence of the two organizations might be a good idea? 
>

I think that is a very good question, and also I think a question that very 
often comes up when companies have charitable organizations affiliated with 
them (this would in some sense be the reverse) so probably a question that 
has well-defined answers, at least in the USA.

I also note that a number of people have asked in the past about whether a 
US or European or other foundation would be best (e.g. for granting 
purposes), or possibly multiple such - I have no particular opinion on 
that, but wanted to remind of those discussions.  It would be worth talking 
to R or GAP or other folks on this, perhaps.

- kcrisman

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[sage-devel] "The SageMath Foundation"

2015-06-01 Thread Franco Saliola 
Hey William,

What is the goal of this organization and the relationship with the 
organization that runs SMC? Perhaps a question to the lawyers about the 
coexistence of the two organizations might be a good idea?

Franco

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[sage-devel] Can't install latest sagmath-upstream-binary from ppa

2015-06-01 Thread Huayi Wei 

Hi, there,

I met the following error when I install sage from ppa. My system is 
Ubuntu 14.04 LTS 64bit.


I need your help. Thanks very much.

Best

Huayi

```
:~$ sudo apt-get install sagemath-upstream-binary
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
  sagemath-upstream-binary
0 upgraded, 1 newly installed, 0 to remove and 10 not upgraded.
Need to get 270 MB of archives.
After this operation, 2,055 MB of additional disk space will be used.
Get:1 http://ppa.launchpad.net/aims/sagemath/ubuntu/ trusty/main 
sagemath-upstream-binary amd64 6.7ppa8revert6.6 [270 MB]

Fetched 270 MB in 8min 44s (514 kB/s)
Selecting previously unselected package sagemath-upstream-binary.
(Reading database ... 819671 files and directories currently installed.)
Preparing to unpack 
.../sagemath-upstream-binary_6.7ppa8revert6.6_amd64.deb ...

Unpacking sagemath-upstream-binary (6.7ppa8revert6.6) ...
Processing triggers for mime-support (3.54ubuntu1.1) ...
Processing triggers for gnome-menus (3.10.1-0ubuntu2) ...
Processing triggers for desktop-file-utils (0.22-1ubuntu1) ...
Processing triggers for bamfdaemon (0.5.1+14.04.20140409-0ubuntu1) ...
Rebuilding /usr/share/applications/bamf-2.index...
Setting up sagemath-upstream-binary (6.7ppa8revert6.6) ...
Running Sage once as root to set paths
┌┐
│ SageMath Version 6.6, Release Date: 2015-04-14 │
│ Type "notebook()" for the browser-based notebook interface. │
│ Type "help()" for help. │
└┘
The Sage installation tree has moved
from /home/buildbot/build/sage/snapperkob/sage_git/build
  to /usr/lib/sagemath
Updating various hardcoded paths...
(Please wait at most a few minutes.)
DO NOT INTERRUPT THIS.
Done updating paths.
Traceback (most recent call last):
  File "/usr/lib/sagemath/src/bin/sage-ipython", line 7, in 
from sage.repl.interpreter import SageTerminalApp
  File 
"/usr/lib/sagemath/local/lib/python2.7/site-packages/sage/__init__.py", 
line 3, in 

from sage.repl.ipython_extension import load_ipython_extension
  File 
"/usr/lib/sagemath/local/lib/python2.7/site-packages/sage/repl/ipython_extension.py", 
line 59, in 

from IPython.core.magic import Magics, magics_class, line_magic
  File 
"/usr/lib/sagemath/local/lib/python2.7/site-packages/IPython/__init__.py", 
line 45, in 

from .config.loader import Config
  File 
"/usr/lib/sagemath/local/lib/python2.7/site-packages/IPython/config/__init__.py", 
line 6, in 

from .application import *
  File 
"/usr/lib/sagemath/local/lib/python2.7/site-packages/IPython/config/application.py", 
line 9, in 

import json
  File "/usr/lib/sagemath/local/lib/python/json/__init__.py", line 108, 
in 

from .decoder import JSONDecoder
  File "/usr/lib/sagemath/local/lib/python/json/decoder.py", line 5, in 


import struct
  File "/usr/lib/sagemath/local/lib/python/struct.py", line 1, in 
from _struct import *
ImportError: No module named _struct
dpkg: error processing package sagemath-upstream-binary (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 sagemath-upstream-binary
E: Sub-process /usr/bin/dpkg returned an error code (1)

```


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Re: [sage-devel] MathJax limit for TeX expression in notebook

2015-06-01 Thread Michal Bejger 
Hi Thierry, 

Using SageManifolds, I can produce long equations quite easily - for 
testing 
I also decreased the value of MAXBUFFER in 
$SAGE_ROOT/local/share/mathjax/config/TeX-AMS_HTML-full.js 
(javascript file used by ipython notebook) from 5*1024 to 128. Then I have 

%display latex
M = Manifold(2,'M')
X. = M.chart()
h = M.scalar_field(function('h',x,y))
dh = h.differential()
dh.display() # works 

(dh*dh).display() # is too long and not rendered properly 

Btw. I'm a little baffled at the moment, because the following works fine 

m = matrix(QQ, 16, 16, lambda i, j: i+j)
latex(m)

 Cheers, 

 Michał 


On Sunday, May 31, 2015 at 5:40:28 PM UTC+2, Thierry (sage-googlesucks@xxx) 
wrote:
>
> Hi, 
>
> it is doable, especially since the bound on MAXBUFFER seems to aim only at 
> avoiding infinite loops. 
>
> Could you please send an easy way to produce such huge formula in Sage so 
> that i can test further ? 
>
> Ciao, 
> Thierry 
>
>
>
> On Thu, May 28, 2015 at 02:21:01PM -0700, Michal Bejger wrote: 
> > Dear Sage Devs, 
> > 
> > I have a question related to the limited length of a TeX expression 
> > rendered by MathJax in the notebook - the variable responsible 
> > for it is MAXBUFFER [1], and its default value is 5*1024 (5KB), 
> > which in most cases is quite all right but sometimes, for example 
> > when printing tensor components in SageManifolds 
> > (sagemanifolds.obspm.fr), it's not enough. 
> > 
> > Is it possible to pass a MathJax preamble in the notebook? 
> > Or alternatively, can we have MAXBUFFER increased in Sage 
> > local/share/mathjax/config/TeX-AMS_HTML-full.js default configuration? 
> > 
> >  Best regards, 
> > 
> >  Michał 
> > 
> > [1] http://docs.mathjax.org/en/latest/options/TeX.html 
> > 
> > -- 
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[sage-devel] sequences in SageMath

2015-06-01 Thread Daniel Krenn 
Dear all,

similar to
graphs.some_graph
or to
codes.some_code
(and similar), I propose to introduce
sequences.some_sequence
which should provide a unified access point to all possible sequences in
SageMath. For example, there is fibonacci_sequence in
sage.combinat.combinat, binary_recurring_sequence (somewhere in
combinat) and various other code.

One motivation for creating this, is to include here many sequences,
which can be calculated term-by-term (from the previously calculated
ones, i.e., recursively) or where the first N terms can be calculated at
once efficiently.
Nevertheless, it can also provide an interface to sequences, where each
term can be calculated explicitly (without dealing with the previous ones).

This posting is to discuss this new feature at this early stage (see
trac ticket #18565 [1] for a draft).

- In this draft, all sequences are iterator/generator expressions
(finite or maybe infinite). This is to keep it simple. [*]
What do you think about this?

- At the moment this module is in sage.combinat. Another option would be
to create sage.sequences and put it there. Any opinions on this?

- In the trac ticket, the function fibonacci_sequence will be
deprecated, since this is then sequence.fibonacci(...). I am also happy
not to deprecate it and keep it as it is (only changing the code to
avoid code duplication)

- I found a function fibonacci_xrange. It is completly unclear (to me)
from the name, what this function does (in particular, why "xrange" (and
not a simple "range"). For this reason, I propose to deprecate this
function (an alternative with the new sequences-interface is provided).

- Should the oeis-functionality be included in some way (at some point)?
At the moment
iter(oeis(...).first_terms())
comes closest.

Best wishes

Daniel

[1] http://trac.sagemath.org/ticket/18565

[*] An alternative would be to create a class and do it in a similar way
as sage.combinat.words.Word (of course in this case much more has to be
done than now; (common base-class for words/sequences?!? ...not sure
what to think about this...)).

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[sage-devel] Re: "The SageMath Foundation"

2015-06-01 Thread Dima Pasechnik 


On Monday, 1 June 2015 05:34:56 UTC+1, Nathann Cohen wrote:
>
> Anyways, what I'm talking about here is an independent tax exempt 
>> organization, with a board, 
>> treasurer, etc. So... are there any questions or concerns you (as 
>> a Sage developer) have, which I 
>> should keep in mind? 
>>
>
> Here is one of mine: since you will be receiving and spending donations 
> made through Sage's website (Home -> Donate), I guess that as developers it 
> would be cool if we could knew how you spend it. So some kind of "open 
> accounting", available online?
>

http://www.irs.gov/pub/irs-tege/eo_disclosure_faqs.pdf tells you that US 
charities operate more or less in the open; not sure if every expense must 
be shown on demand, IANAL, or granularity like: "US$10,000 on Sage Days 
X.Y" is detailed enough. 

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[sage-devel] Re: R failed to build (GOMP_4.0 not found)

2015-06-01 Thread Dima Pasechnik 
I understand that due to #17349 a workaround would be to do 
> SAGE_FAT_BINARY=yes ./sage -f r

but this is weird...


On Sunday, 31 May 2015 16:31:12 UTC+1, Dima Pasechnik wrote:
>
> on Ubuntu 14.04 and Sage 6.8.beta2, I see
>
> SAGEROOT/local/lib$ ldd R/lib/libR.so 
> R/lib/libR.so: /usr/lib/x86_64-linux-gnu/libgomp.so.1: version `GOMP_4.0' 
> not found (required by R/lib/libR.so)
> linux-vdso.so.1 =>  (0x7fff066ae000)
> libf77blas.so.3 => not found
> libatlas.so.3 => not found
> libgfortran.so.3 => /usr/lib/x86_64-linux-gnu/libgfortran.so.3 
> (0x7f8b89e3a000)
> libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x7f8b89b34000)
> libquadmath.so.0 => /usr/lib/x86_64-linux-gnu/libquadmath.so.0 
> (0x7f8b898f8000)
> libreadline.so.6 => /lib/x86_64-linux-gnu/libreadline.so.6 
> (0x7f8b896b1000)
> libbz2.so.1 => /lib/x86_64-linux-gnu/libbz2.so.1 
> (0x7f8b894a1000)
> libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x7f8b89288000)
> librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x7f8b8907f000)
> libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x7f8b88e7b000)
> libgomp.so.1 => /usr/lib/x86_64-linux-gnu/libgomp.so.1 
> (0x7f8b88c6c000)
> libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 
> (0x7f8b88a4d000)
> libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x7f8b88688000)
> /lib64/ld-linux-x86-64.so.2 (0x7f8b8a7aa000)
> libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 
> (0x7f8b88472000)
> libtinfo.so.5 => /lib/x86_64-linux-gnu/libtinfo.so.5 
> (0x7f8b88248000)
>
> but Sage works and passes ptestlong...
> (it also worked for Sage 6.7)
>
> Which gcc do you use? I use the one from Sage (gcc 4.9.2)
>
>
>
>
> On Friday, 29 May 2015 15:10:06 UTC+1, Dow Drake wrote:
>>
>> Hi,
>>
>> I attached the log file.  My machine is a Dell Latitude notebook running 
>> Linux Mint 17.1 (essentially an Ubuntu).  Thanks for any help on this...
>>
>>
>> installing 'sysdata.rda'
>> /home/dow/sage/sage-6.7/local/var/tmp/sage/build/r-3.2.0.p0/src/bin/exec/R: 
>> /usr/lib/x86_64-linux-gnu/libgomp.so.1: version `GOMP_4.0' not found 
>> (required by 
>> /home/dow/sage/sage-6.7/local/var/tmp/sage/build/r-3.2.0.p0/src/lib/libR.so)
>>
>

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Re: [sage-devel] Re: Automatic testing of (installed) optional packages

2015-06-01 Thread Dima Pasechnik 


On Sunday, 31 May 2015 19:12:41 UTC+1, Nathann Cohen wrote:
>
> Yoo ! 
>
> > I wonder if there is a way to make a test dependent on absence of a 
> given 
> > optional package, 
> > not only on presence of it. 
> > 
> > There are cases where this will be handy. 
>
> Well, Technically there is nothing that prevents us from doing it. We 
> can easily get the list of all installed packages, and we can flag 
> doctests with 'fake' # optional no_whatever if we like. 
>
> something like '# standard no_blah' would sound 

> Doing it cleanly is yet another thing :-P  
>



I'm still thinking of a proper way to handle testing of LP backends.
This would have been one way, using '# standard no_blah'.


> Nathann 
>

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Re: [sage-devel] Problems installing package qepcad

2015-06-01 Thread Robert Pollak 
François Bissey wrote:
> The spkg probably need an update as well as some love before being
> usable.

B.t.w., this is http://trac.sagemath.org/ticket/10224 .

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