[sage-support] Re: promote Sage on python success stories

[Harald Schilly]

> https://www.python.org/about/success/ 


That's a nice idea, but how to submit something and what exactly? On one 
hand one can mention that Sage is used by "some people" and that there are 
a lot of Python code-lines. On the other hand, many more still do not use 
Sage and many lines of code are actually Cython. 

Is it correct that this explains how to submit something?
http://brochure.getpython.info/learn-more

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[sage-support] apparent numerical integration bug in sage

[Anthony Kable]

I have run the code

var('x')
f1(x)=1/sqrt(x^3+2)
f2(x)=1/sqrt(x^4+2)
r1=RR(integrate(f1(x),(x,1,10^(10
r2=RR(integrate(f2(x),(x,1,10^(10
s1=RR(integrate(f1(x),(x,1,10^(11
s2=RR(integrate(f2(x),(x,1,10^(11
integrals_for_comparison=[[r1,r2],[s1,s2]]
integrals_for_comparison

on Sage Version 6.2, Release Date: 2014-05-06 on both a mac running OSX 
10.9 and an old hp compaq running ubuntu 14.04, using
the notebook interface in both cases with Safari as the browser on the mac 
and Firefox as the browser on the compaq.

In both cases, I obtained the result

[[1.82808026966879, 0.881569060342641], [1.82809394511342,
2.32149165988606e-7]].


The integrals to 10^(10) are being evaluated more or less correctly, as is 
the integral of f1 to 10^(11), but the
integral of f2 to 10^(11) is wrong by about seven orders of magnitude.

Despite my question title, I do not actually know enough about how sage 
handles this computation to know whether it is a
numerical integration bug or a bug in the numerical evaluation of elliptic 
functions, but something is obviously wrong. 

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[sage-support] Re: sage-6.3-x86_64-Darwin-OSX_10.6_x86_64-app.dmg won't be built?

[Daniel Friedan]

All the executables/libraries are 64bit.  (per output from $ file 
sage/local/lib/*; file sage/local/bin/*)

Attached is the log for the package that failed: polybori-0.8.3.log

Daniel


On Wednesday, August 27, 2014 6:17:23 PM UTC, Dima Pasechnik wrote:
>
> On 2014-08-27, Daniel Friedan > wrote: 
> > --=_Part_3092_594188982.1409156737747 
> > Content-Type: text/plain; charset=UTF-8 
> > 
> > Still trying to build 64bit Sage 6.3 on an OS X 10.6.8 Core 2 Duo 
> machine. 
> > 
> > Dima's suggestion '$ export SAGE64=yes ' did not work.   
>
> did it have any effect on the type of executables/libraries that did build 
> OK? 
> (you can use 'file' in SAGE_LOCAL/lib and SAGE_LOCAL/bin to find out...) 
>
> if yes, please post the log related to the package (from 
> SAGE_ROOT/logs/pkgs/) 
>
> > 
> > 'make' failed -- one package failed to build (error message copied 
> below).   
> > 
> > Note that 'make'  previously succeeded without '$ export SAGE64=yes ' . 
> > 
> > '$ ./sage -bdist' succeeded, but produced a 32 bit Sage-6.3.app  which 
> was 
> > only 1.1G large (compared to 3.5G for the usual Sage-6.3.app). 
>
> probably something incomplete and not working. 
>
>
>

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polybori-0.8.3.log
Description: Binary data

Re: [sage-support] Question about solve_sat

[Juan Grados]

thanks


2014-08-27 14:05 GMT-03:00 Martin Albrecht :

> It means that the system is believed to be unsolvable.
>
> On Wednesday 27 Aug 2014 13:54:47 Juan Grados wrote:
> > Dear members,
> >
> > I'm trying to solve the attach formulas but I get FALSE, anyone know what
> > means that, or Why I get FALSE?
> >
> > sage: solve_sat(PolynomialSequence(F,RR),n=infinity)
> > False
> >
> > thanks
>
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>



-- 
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Laboratório Nacional de Computação Científica
Tel: +55 21 97633 3228
(http://www.lncc.br/)
http://juaninf.blogspot.com
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[sage-support] Re: sage-6.3-x86_64-Darwin-OSX_10.6_x86_64-app.dmg won't be built?

[kcrisman]

> 
> > You always say stuff like that ("buy the poor guy a few gig of ram", 
> etc.). 
> >But it's not "grossly" negligent if you aren't going to phishing 
> sites 
>
> well, our sysadmins told me in no uncertain terms few months ago that they 
> won't let a laptop running OSX 10.6 anywhere near our intranet. 
> Go figure. 


They're paid to worry.  I'm not saying it can't happen, and it does all the 
time.  But it can also happen with up-to-date (Heartbleed, anyone?).
 
> I don't say that because I think Linux is bad.  Plop this argument into 
the 
> developing world with few IT resources of the sort needed to make Linux 
fun 
> and easy, or to try to just randomly find exactly the chip you need at 
the 
> price you can pay ... 

> Developing world is used to run pirated software, don't you known this? 

Well, yes.  But that doesn't make my argument go away, though it was 
interesting that piracy rates weren't really correlated with open source 
adoption either direction.

http://mitpress.mit.edu/books/comingled-code

> Linux runs on pretty much every Intel box, provided it is not bleeding 
edge. 

Interesting article I read about Peace Corps volunteers needing to figure 
out what to do with machines with < 256 MB of RAM, where Linux wouldn't 
play nice.

Anyway, this is all OT, sorry.

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[sage-support] Re: sage-6.3-x86_64-Darwin-OSX_10.6_x86_64-app.dmg won't be built?

[Dima Pasechnik]

On 2014-08-27, Daniel Friedan  wrote:
> --=_Part_3092_594188982.1409156737747
> Content-Type: text/plain; charset=UTF-8
>
> Still trying to build 64bit Sage 6.3 on an OS X 10.6.8 Core 2 Duo machine.
>
> Dima's suggestion '$ export SAGE64=yes ' did not work.  

did it have any effect on the type of executables/libraries that did build OK?
(you can use 'file' in SAGE_LOCAL/lib and SAGE_LOCAL/bin to find out...)

if yes, please post the log related to the package (from SAGE_ROOT/logs/pkgs/)

>
> 'make' failed -- one package failed to build (error message copied below).  
>
> Note that 'make'  previously succeeded without '$ export SAGE64=yes ' .
>
> '$ ./sage -bdist' succeeded, but produced a 32 bit Sage-6.3.app  which was 
> only 1.1G large (compared to 3.5G for the usual Sage-6.3.app).

probably something incomplete and not working.


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Re: [sage-support] Re: promote Sage on python success stories

[Joel B. Mohler]

On 08/27/2014 08:30 AM, kcrisman wrote:



A failure ? Why ?



See http://sagemath.blogspot.com/

However, note that this is with respect to a very high goal indeed, 
which is to replicate every last bit of functionality in the programs 
mentioned in the mission statement.


It is a very high goal but I think that "replicate every last bit of 
functionality" is NOT equivalent with be "a viable alternative". After 
all is Mathematica a viable alternative to sage?  It certainly does not 
replicate every last bit of functionality of sage (one of the reasons 
I'd never touch mathematica with a 10 foot pole is that mathematica's 
idea of a programming language drastically doesn't fit my brain -- and I 
think the batteries included nature of python is important 
functionality).  But, I think I may simply have constructed an argument 
that it's not possible to be reach the high points of sage & mathematica 
in one package.


Joel (ex-sage user; now in a parallel industry)

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Re: [sage-support] Question about solve_sat

[Martin Albrecht]

It means that the system is believed to be unsolvable.

On Wednesday 27 Aug 2014 13:54:47 Juan Grados wrote:
> Dear members,
> 
> I'm trying to solve the attach formulas but I get FALSE, anyone know what
> means that, or Why I get FALSE?
> 
> sage: solve_sat(PolynomialSequence(F,RR),n=infinity)
> False
> 
> thanks

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[sage-support] Question about solve_sat

[Juan Grados]

Dear members,

I'm trying to solve the attach formulas but I get FALSE, anyone know what
means that, or Why I get FALSE?

sage: solve_sat(PolynomialSequence(F,RR),n=infinity)
False

thanks
-- 
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MSc. Juan del Carmen Grados Vásquez
Laboratório Nacional de Computação Científica
Tel: +55 21 97633 3228
(http://www.lncc.br/)
http://juaninf.blogspot.com
-

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polynomialSequece
Description: Binary data

[sage-support] Re: sage-6.3-x86_64-Darwin-OSX_10.6_x86_64-app.dmg won't be built?

[Daniel Friedan]

Still trying to build 64bit Sage 6.3 on an OS X 10.6.8 Core 2 Duo machine.

Dima's suggestion '$ export SAGE64=yes ' did not work.  

'make' failed -- one package failed to build (error message copied below).  

Note that 'make'  previously succeeded without '$ export SAGE64=yes ' .

'$ ./sage -bdist' succeeded, but produced a 32 bit Sage-6.3.app  which was 
only 1.1G large (compared to 3.5G for the usual Sage-6.3.app).

=
2014-08-27 build Sage-6.3 trying for 64bit version

$ git clone git://github.com/sagemath/sage.git
$ cd sage
$ git checkout 6.3
$ export SAGE64=yes
$ export MAKE="make -j2"
$ $MAKE

[... lots of output ...]

***
Error building Sage.

The following package(s) may have failed to build:

package: polybori-0.8.3
log file: 
//NOT_ON_SSD/Software/sage_build/build2/sage/logs/pkgs/polybori-0.8.3.log
build directory: 
//NOT_ON_SSD/Software/sage_build/build2/sage/local/var/tmp/sage/build/polybori-0.8.3

The build directory may contain configuration files and other potentially
helpful information. WARNING: if you now run 'make' again, the build
directory will, by default, be deleted. Set the environment variable
SAGE_KEEP_BUILT_SPKGS to 'yes' to prevent this.

make: *** [build] Error 1

$ git checkout 6.3

$ git remote add trac git://trac.sagemath.org/sage.git -t master
$ git fetch trac u/iandrus/trac-16796
$ git checkout FETCH_HEAD

$ export SAGE_APP_DMG=yes
$ export SAGE_APP_BUNDLE=yes
$ ./sage -bdist

[Build succeeded but produced 32 bit app version, size only 1.1G]
=
thanks,
Daniel Friedan

On Tuesday, August 26, 2014 8:19:22 PM UTC, Dima Pasechnik wrote:
>
> On 2014-08-26, Daniel Friedan > wrote: 
> > --=_Part_4367_1566256233.1409080390865 
> > Content-Type: text/plain; charset=UTF-8 
> > 
> > I've been able to run the 64 bit version of Sage 6.2 onn my Core 2 Duo 
> OS X 
> > 10.6 macbookpro with no trouble.   
> > This is the version I downloaded as 
> > *sage-6.2-x86_64-Darwin-OSX_10.6_x86_64-app.dmg* 
> ><
> http://boxen.math.washington.edu/home/sagemath/sage-mirror/osx/intel/sage-6.2-x86_64-Darwin-OSX_10.6_x86_64-app.dmg>
>  
>
> > 
> > The problem seems to be with *building* a 64 bit version. 
> > Is it impossible to build a 64bit version of Sage on this machine? 
>
> Perhaps you just have to 
>
> $ export SAGE64=yes 
>
> before starting make. 
>
> cf. http://www.sagemath.org/doc/installation/source.html 
> for details. 
> (it says SAGE64=yes is only needed on OSX 10.4 and 10.5 though) 
>
>
>

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Re: [sage-support] bug in det() for symbolic matrix entries?

[William A Stein]

On Wed, Aug 27, 2014 at 2:46 PM, Peter Mueller  wrote:
> My understanding of Sage is that var('e') declares e as a symbolic variable,
> no matter that it was the Euler number before. The last line leaves me
> clueless what goes wrong ...
>
> sage: var('e')
> e
> sage: matrix.diagonal([e,1,1]).det()
> e
> sage: matrix.diagonal([e,1,1,1]).det()
> _e
>
> -- Peter Mueller

The real bug is in conversion from Maxima to Sage.  Observe:

~/wstein/sage-6.4.beta1$ ./sage
sage: maxima('_SAGE_VAR_e')._sage_()
_e
sage: maxima('_SAGE_VAR_x')._sage_()
x
sage: maxima('_SAGE_VAR_foo')._sage_()
foo

More precisely, this is wrong because of the function
sage.calculus.calculus.symbolic_expression_from_maxima_string having a
bug:

sage: 
sage.calculus.calculus.symbolic_expression_from_maxima_string("_SAGE_VAR_e",maxima=maxima)
_e
sage: 
sage.calculus.calculus.symbolic_expression_from_maxima_string("_SAGE_VAR_f",maxima=maxima)
f

This function is not easy to understand (I kind of think maybe I wrote
some version of it)... but it is just some pure python, so hopefully
somebody can fix this...

>
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-- 
William Stein
Professor of Mathematics
University of Washington
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wst...@uw.edu

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Re: [sage-support] Where to find the MCQD package?

[Vincent Delecroix]

Thanks to Volker Braun the sagemath server is synchronized and you can do

 $ sage -i mcqd

or

 $ sage -i pip

As William mentioned, it is adviced to run "make" each time you
installed a package (actually the advice shows up at the end of the
output of the command "sage -i X")

Vincent

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[sage-support] bug in det() for symbolic matrix entries?

[Peter Mueller]

My understanding of Sage is that var('e') declares e as a symbolic 
variable, no matter that it was the Euler number before. The last line 
leaves me clueless what goes wrong ...

sage: var('e')
e
sage: matrix.diagonal([e,1,1]).det()
e
sage: matrix.diagonal([e,1,1,1]).det()
_e

-- Peter Mueller

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[sage-support] Re: Cubic Root

[slelievre]

See the answers to these ask-sage questions:


http://ask.sagemath.org/question/7820/fractional-power-to-negative-number/

http://ask.sagemath.org/question/10063/get-variants-of-complex-cube-root/


-- Forwarded message --
My name's André, I from Brazil. I have a question: Why a cubic root of -1 
(n((-1)^(1/3)))
 in Sage Math is: 0.500 + 0.866025403784439*I? Not and is -1?
Thank you!
André Xavier

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Re: [sage-support] Re: promote Sage on python success stories

[kcrisman]

A failure ? Why ?
>
>>
>>
See http://sagemath.blogspot.com/

However, note that this is with respect to a very high goal indeed, which 
is to replicate every last bit of functionality in the programs mentioned 
in the mission statement.

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Re: [sage-support] Re: promote Sage on python success stories

[William A Stein]

On Wed, Aug 27, 2014 at 2:16 PM, Christophe Bal  wrote:
> A failure ? Why ?
>

Nathann is making a joke, based on a sage-devel thread, in which I
explain why I'm putting so much energy into https://cloud.sagemath.com

> Le 27 août 2014 13:37, "Nathann Cohen"  a écrit :
>
>>> Please consider adding on Python mainstream webpage some info about Sage
>>> project. It was a great idea to choose Python as a main programming language
>>> to implement Sage project.
>>> So I think that python and python foundation will be proud to hear about
>>> that. So I think that it will be good idea to add some notes here:
>>> https://www.python.org/about/success/
>>
>>
>> I am not sure that we qualify. We have an ongoing debate about whether
>> Sage is a failure :-)
>>
>> Nathann
>>
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-- 
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Re: [sage-support] Re: promote Sage on python success stories

[Christophe Bal]

A failure ? Why ?
Le 27 août 2014 13:37, "Nathann Cohen"  a écrit :

> Please consider adding on Python mainstream webpage some info about Sage
>> project. It was a great idea to choose Python as a main programming
>> language to implement Sage project.
>> So I think that python and python foundation will be proud to hear about
>> that. So I think that it will be good idea to add some notes here:
>> https://www.python.org/about/success/
>>
>
> I am not sure that we qualify. We have an ongoing debate about whether
> Sage is a failure :-)
>
> Nathann
>
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[sage-support] Re: promote Sage on python success stories

[Nathann Cohen]

>
> Please consider adding on Python mainstream webpage some info about Sage 
> project. It was a great idea to choose Python as a main programming 
> language to implement Sage project. 
> So I think that python and python foundation will be proud to hear about 
> that. So I think that it will be good idea to add some notes here:
> https://www.python.org/about/success/
>

I am not sure that we qualify. We have an ongoing debate about whether Sage 
is a failure :-)

Nathann 

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