[sage-support] Re: Combinatorics / Graph theory question
Hi, Thanks a lot :) with t-design it was easy :) result: http://galvosukykla.lt/rodyk/thumbs.php?p=//stalo_zaidimai/73_cards/png&dim=150 2012 m. gruodis 10 d., pirmadienis 02:28:44 UTC+2, Nathann Cohen rašė: > > Ahahahahah :-) > > Beautiful problem ! Not really a graph problem, but a beautiful problem. > > What do you think of this ? > > > http://www.sagemath.org/doc/reference/sage/combinat/designs/block_design.html#sage.combinat.designs.block_design.steiner_triple_system > > Does it sound familiar ? But then it only works for cards with 3 pictures > on it. The trouble is that what you are looking for is not exactly > straightforward to produce... > > > http://en.wikipedia.org/wiki/Block_design#Definition_of_a_BIBD_.28or_2-design.29 > > You will find some solutions there : > > http://designtheory.org/database/t-designs/ > > You are interested in the following values : > t = 2 (because you have a condition on PAIRS of elements) > L = 1 (because only ONE card must contain both symbols at the same time) > v (the total number of elements) > k (the number of elemens on each card) > > By the way, Sage's documentation points toward this file, which may > interest you : http://www.utu.fi/~honkala/designs.ps > > > > Oh, and having more of this kind of stuff inside of Sage would be really, > really, REALLY great :-) > > Have fuuun ! > > Nathann > -- You received this message because you are subscribed to the Google Groups "sage-support" group. 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. Visit this group at http://groups.google.com/group/sage-support?hl=en.
[sage-support] Combinatorics / Graph theory question
Hi, folks I was playing around with one board-game cards generation :) you can see example with 10 cards http://galvosukykla.lt/rodyk/thumbs.php?p=//stalo_zaidimai/10_cards-single_joins/png&dim=150 *Each couple of cards must have just one same image.* Bruteforce would be http://en.wikipedia.org/wiki/Complete_graph with separate image per vertex. I managed to come up with simple optimization for 10cards (instead of 45, I managed with 20) But if I'd like to have 40 cards or so... I am still in trouble... What would be most optimal solution, if I'd like to have 40 cards, and up to 9 images on card? I would let - that two cards have more than one same image (but preferably not many)... Any hints? :) -- Jurgis Pralgauskis tel: 8-616 77613; Don't worry, be happy and make things better ;) http://galvosukykla.lt -- You received this message because you are subscribed to the Google Groups "sage-support" group. 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. Visit this group at http://groups.google.com/group/sage-support?hl=en.
[sage-support] sage squashfs?
Hello, I found http://wiki.sagemath.org/SagemathLive and liked the idea a lot. but I can't access http://boxen.math.washinegton.edu/home/frank/sagemath/squashfs/karmic/karmic-sage-4.3.1.sqfs I have netbook with limited diskspace, and I'd like to take it to the journey. it runs Lubuntu 10.4 (I am not sure if carmic squashfs would do...) of course, I understand, I could make squashfs file myself: install it on richer PC running Ubuntu lucid, and then run mksquashfs command what else should I take into account? and would my netbook (EeePc 701, 500MB RAM) be enough to play with sage (or run notebook)? Thanks in advance -- Jurgis Pralgauskis Don't worry, be happy and make things better ;) -- 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] how to controll precision when show'ing formulas?
hello, I am constructing simple interact http://sagenb.org/home/pub/592/ in published worksheet, interact seems not to function so I give the picture.. http://ftp.akl.lt/users/jurgis/etc/formule_show_precision--how.png I want that show(function) would give me just 1 precision digit after comma how could I achieve this? now I use html which is quite unconfortable thanks in advance -- Jurgis Pralgauskis Don't worry, be happy and make things better ;) --~--~-~--~~~---~--~~ 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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] how to convert sage matrix to numpy array?
Hello, what would be the best (and shortest) way to convert sage matrix (like matrix([[1, 2], [3, 4]]) ) to numpy array: numpy.array([[1, 2], [3, 4]]) or is there any other way to multiply sage matrix per member ? Thanks in advance :) -- Jurgis Pralgauskis tel: 8-616 77613; --~--~-~--~~~---~--~~ 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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] interactive visualizing cross-sections of solids ?
Hello, stereometry needs imagination or more experience, to understand cross-sections and so on I found some interactive example http://www.learner.org/courses/learningmath/geometry/session9/part_c/index.html I'd like to have sage interact for solid construction and cutting_plane parameters and then view it around via jmol :) in school this is mostly needed for parallelepiped or pyramid solids: mysolid = SomeSolid(apex_points_3D) # and I can get, mysolid.surface_planes() #so I'd expect to have algorithms which detect intersection = Intersection(mysolid, cutting_plane) # we get some 2D polygon, # probably first analytically findintersection.lines # and then solve the # self.segmets = self.endpoints (self.lines , self.mysolid) # for conic would be some different approach ... intersection.fill() # or draw() would draw some lines or color to show it what does sage have already, and what would need to be hacked? Thanks in advance :) ps.: just for reference http://en.wikipedia.org/wiki/Cross_section_(geometry) http://en.wikipedia.org/wiki/Conic_section -- Jurgis Pralgauskis Don't worry, be happy and make things better ;) --~--~-~--~~~---~--~~ 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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] RSACryptosystem in Cryptography book (by Kohel) is ghost :? + small typo
Hello, just trying to follow examples of http://www.sagemath.org/library/crypto.pdf Exercise 8.5 solution: page nr 124 (or 127 for file) has suspicious code sage: E := RSACryptosystem(128) sage: m = E.encoding(’The dog ate my lunch.’); m first of all typo of assignment (seems like in Pascal) then no such Class/method seems to exists -- not a big problem, but just curiuous what happend to it.. In advance Thanks for explanations :) --~--~-~--~~~---~--~~ 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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: weird output in notebook (on jaunty installation via debs)
> Unfortunately, Debian/Ubuntu package a very old and buggy version of > Sage. You should use a version of Sage that you download > fromhttp://sagemath.orginstead. Get either a binary, or build from > source. why are debs not updated? I don't know much about them, and as I remember main packaging is "spkg", would it be hard to automate transformationt to debs? this would mean more courage for sysadmins towards sage (as updates would be supposed to be without headache :) ) --~--~-~--~~~---~--~~ 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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] weird output in notebook (on jaunty installation via debs)
Hello, I have sage on fresh Ubuntu jaunty, SAGE Version 3.0.5, Release Date: 2008-07-11 but when I use notebook, I get unnecessary output and line endings of it seem like have encoding problems.. you see the screenshot.. http://files.akl.lt/users/jurgis/etc/sagemath-jaunty-weird_output.png where's the rub? --~--~-~--~~~---~--~~ 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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: could vanished sage site links become redirect points?
well, quickreff might be my mistake, as I find it http://wiki.sagemath.org/quickref but still http://www.sagemath.org/pub.html http://www.sagemath.org/ack.html seem to be somewhere else or away maybe http://www.sagemath.org/library/publications.html http://www.sagemath.org/development-ack.html On Sun, Feb 22, 2009 at 5:04 PM, Jurgis Pralgauskis wrote: > Hello, > > once I made a flyer about sage > http://sagemath.visiems.lt/ > > it had several nice url's > http://www.sagemath.org/screen_shots/ > http://sagemath.org/quickref > > but now they show boring 404 -- can a redirect be done.. > (as I am too lazy to correct the flyer : ) > > > -- > Jurgis Pralgauskis > tel: 8-616 77613; > jabber: jur...@akl.lt; skype: dz0rdzas; > Don't worry, be happy and make things better ;) > http://sagemath.visiems.lt > -- Jurgis Pralgauskis tel: 8-616 77613; jabber: jur...@akl.lt; skype: dz0rdzas; Don't worry, be happy and make things better ;) http://sagemath.visiems.lt --~--~-~--~~~---~--~~ 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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] could vanished sage site links become redirect points?
Hello, once I made a flyer about sage http://sagemath.visiems.lt/ it had several nice url's http://www.sagemath.org/screen_shots/ http://sagemath.org/quickref but now they show boring 404 -- can a redirect be done.. (as I am too lazy to correct the flyer : ) -- Jurgis Pralgauskis tel: 8-616 77613; jabber: jur...@akl.lt; skype: dz0rdzas; Don't worry, be happy and make things better ;) http://sagemath.visiems.lt --~--~-~--~~~---~--~~ 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 URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: code generation
pypy has some power in this direction http://www.strakt.com/~jacob/Pypy_for_the_rest_of_us.pdf http://morepypy.blogspot.com/ On Fri, Oct 24, 2008 at 12:38 PM, Tim Lahey <[EMAIL PROTECTED]> wrote: > On Oct 24, 2008, at 5:28 AM, peter wrote: > >> >> OK, sorry, I explain a little bit more in detail: >> - I work on thermal building simulation. We use for example one >> environment (TRNSYS) where you can connect models (for example >> building model to heating system model etc.). The models are mainly >> written in Fortran or C++ and compiled in DLL's that are then called >> by the equation solver. >> Our goal is to write the models not in C+++ or fortran anymore, but >> either in Matlab (and or Simulink), Scilab or Sage. >> So in clear, I want to profit of one of these mathematical >> environments, write models there and use them later in our simulation >> program. > > One thing you can do is prototype in Sage and python, make use of profiling > tools and then re-write the computation intensive portions using Cython or > Pysco. At the moment, there really aren't tools to generate C++ or Fortran > code from the Sage code. However, the latter tools are close to Python in > syntax and can work with Sage. > > That said, I'm fairly certain that it wouldn't be very difficult to write a > code generator for Sage. If one can get the underlying structure of each of > the expressions, it shouldn't be very difficult to convert that to C++ or > Fortran as long as the expressions can be represented in the language > without additional code. This is the approach that most the code generators > I've seen use. Maxima has GENTRAN if someone is interested in seeing how one > works and I know there is(are) paper(s) that discuss it. The main problem is > that someone doing this would need to be fairly familiar with Sage > internals. > > Cheers, > > Tim. > > --- > Tim Lahey > PhD Candidate, Systems Design Engineering > University of Waterloo -- Jurgis Pralgauskis tel: 8-616 77613; jabber: [EMAIL PROTECTED]; skype: dz0rdzas; Don't worry, be happy and make things better ;) --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] EuroSciPy: On providing a Computer Algebra System for Python
just stumbled upon, maybe someone finds it interesting http://www.scipy.org/EuroSciPy2008Abstracts#ppeterson --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Sage vs Maple/Mathematica/Matlab: what elements are better + what is mostly lacking?
I am making a presentation on SAGE in university (for PhD students math/informatics) so this is quite general quoestion in university context I can stress first years course and for research I understand that it depends :) but well, people working with the soft should feel some points On Mon, Jun 9, 2008 at 1:41 AM, William Stein <[EMAIL PROTECTED]> wrote: > > On Sun, Jun 8, 2008 at 2:25 PM, Jurgis Pralgauskis > <[EMAIL PROTECTED]> wrote: >> >> Hello, >> >> as the vision of SAGE is to be alternative to MMM, > > True. > >> what do You think is mostly lacking now? > > This depends a huge amount on what you want and why > you are asking. > >> and, what is better than in MMM ones (except open source ;)? > > Again, this depends a lot on what you want and why you > are asking. All these programs we're discussing are massive. > >> maybe there's a wiki page like http://cmsmatrix.org? >> I found only a bit of answer: >> http://en.wikipedia.org/wiki/List_of_computer_algebra_systems >> http://www.sagemath.org/doc/html/ref/module-sage.calculus.wester.html >> >> and I stumbled over quite nice comparison for scipy/numpy vs matlab >> http://web.bryant.edu/~bblais/bryant/numerical_computing/python_matlab.pdf >> >> Thanks in advance >> -- >> Jurgis Pralgauskis >> omni: 8-616 77613; teledema: 8-657 65656; >> jabber: [EMAIL PROTECTED]; skype: dz0rdzas; >> Don't worry, be happy and make things better ;) >> >> > >> > > > > -- > William Stein > Associate Professor of Mathematics > University of Washington > http://wstein.org > > > > -- Jurgis Pralgauskis omni: 8-616 77613; teledema: 8-657 65656; jabber: [EMAIL PROTECTED]; skype: dz0rdzas; Don't worry, be happy and make things better ;) --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Sage vs Maple/Mathematica/Matlab: what elements are better + what is mostly lacking?
Hello, as the vision of SAGE is to be alternative to MMM, what do You think is mostly lacking now? and, what is better than in MMM ones (except open source ;)? maybe there's a wiki page like http://cmsmatrix.org? I found only a bit of answer: http://en.wikipedia.org/wiki/List_of_computer_algebra_systems http://www.sagemath.org/doc/html/ref/module-sage.calculus.wester.html and I stumbled over quite nice comparison for scipy/numpy vs matlab http://web.bryant.edu/~bblais/bryant/numerical_computing/python_matlab.pdf Thanks in advance -- Jurgis Pralgauskis omni: 8-616 77613; teledema: 8-657 65656; jabber: [EMAIL PROTECTED]; skype: dz0rdzas; Don't worry, be happy and make things better ;) --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Jmol black screen in Notebook
I have similar results with the big graphs (~100 vertices) sometimes they show graph ok, and sometimes just blank screen I think this might be because of some data loading issues On Sun, May 11, 2008 at 4:02 PM, mabshoff <[EMAIL PROTECTED]> wrote: > > On May 11, 2:55 pm, "walter neumann" <[EMAIL PROTECTED]> wrote: > > Hi Walter, > > > > No, It is a Dell Latitude D410, 2G memory and 1.73Ghz processor. > > Are you sure Firefox uses the Sun Java plugin? Just because the demo > at the jmol website works doesn't mean that it will work in Sage. You > certainly seem to have enough resources, so if it isn't the wrong > plugin with Firefox I am fresh out of ideas. > > Cheers, > > Michael > > > > > -- Jurgis Pralgauskis omni: 8-616 77613; teledema: 8-657 65656; jabber: [EMAIL PROTECTED]; skype: dz0rdzas; Don't worry, be happy and make things better ;) --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: parenthesis matching in notebook environment
http://Crunchy.sf.net uses editarea,
and they had a rough test on FF3 with no complains on editor
http://groups.google.com/group/crunchy-discuss
there's a screenshot
http://popmokslas.projektas.lt/failai/etc/CrunchyEditor%e2%80%93FF.png
and js
http://www.koders.com/javascript/fidC214ECA4C1C5462DE7D06A92F09654C34B0AC8FA.aspx?s=search
best regards..
On Wed, Apr 23, 2008 at 2:39 PM, William Stein <[EMAIL PROTECTED]> wrote:
>
> On Tue, Apr 22, 2008 at 3:56 PM, Jason Grout
> <[EMAIL PROTECTED]> wrote:
> >
> > Jason Grout wrote:
> > > Lars Fischer wrote:
> > >> Hello,
> > >>
> > >>> I think this feature request is reasonable, but the way to
> > >>> implement it is to just do it directly instead of including a
> > >>> full javascript text editor.What do you think?
> > >> you could write a more general function that does not only match
> > >> parenthesis (), but also brackets [] and braces {} and "" and '' and
> > >> so on.
> > >>
> > >
> > > This page might be relevant and interesting, if only for ideas of what
> > > we could do:
> > >
> > >
> http://en.wikipedia.org/wiki/Comparison_of_Javascript-based_source_code_editors
> >
> >
> > In particular, this editor already has python capabilities, apparently:
> >
> > http://www.cdolivet.net/editarea/
> >
> >
>
> People should play around with that editor and see if it feels
> snappy enough that they would *actually* want to use it a lot.
>
> For me on FF3 the editor doesn't even work, which is
> worrisome.
>
> William
>
>
>
> >
>
--
Jurgis Pralgauskis
omni: 8-616 77613; teledema: 8-657 65656;
jabber: [EMAIL PROTECTED]; skype: dz0rdzas;
Don't worry, be happy and make things better ;)
--~--~-~--~~~---~--~~
To post to this group, send email to sage-support@googlegroups.com
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[sage-support] name 'graphs_query' is not defined (sagenb.org)
n=graphs_query.display_all(num_vertices=5,diameter=3) gives Traceback (most recent call last): File "", line 1, in File "/home/server2/sage_notebook/worksheets/dz0/4/code/33.py", line 8, in n=graphs_query.display_all(num_vertices=Integer(5),diameter=Integer(3)) File "/usr/local/sage/local/lib/python2.5/site-packages/sympy/plotting/", line 1, in NameError: name 'graphs_query' is not defined why? Thanks -- Jurgis Pralgauskis omni: 8-616 77613; teledema: 8-657 65656; jabber: [EMAIL PROTECTED]; skype: dz0rdzas; Don't worry, be happy and make things better ;) --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] SAGE introduction via example (pseudo)research topic -- ideas needed
Hello, I want to introduce SAGE to our uni applied math students during student conference. But conference is for research and not software presentations. So I look for an example research topic (can be simple and obvious) to demonstrate the capabilities of SAGE. i'll have ~10 minutes, so just the most common (first years) study topics and sexiest features ;). Linalg Calculus visual output (graphs, interact), some probablility stuff some symbolic manipulation some combinatorics, maybe number theory maybe some abstract algebra stuff -- probably cryptography might be a good thing to mention --- I want to make very good impression with my example (pseudo)research, and then just mention other topics in some extra slide Any example-topic proposals? -- I think of adapting **Traveling Salesman** problem, so I can show some nice __graphs__ and __combinatorics__, __matrices__ and compare some optimization methods (genetic algorithms and bruteforce I understand best, -- maybe smb can propose more) hope I could __animate__ them. +for calculus purposes and some intrigue -- include (car) velocity mechanics into the model let's say -- the car has no brakes, so it must rely on Friction and not speed too much ;) still not sure, how to incorporate some symbolic algebra in the model... --- different idea was to analyze some social web statistics (Forum or Wiki), and to research browsing, editing or linking patterns or dynamics wikipedia has some stats collected http://stats.grok.se/, http://stats.wikimedia.org/EN/Sitemap.htm I also thought of kind of "wiki-link traveling bot" problem, "How easy would it be to navigate from topicX to topicY (without using search and category links)" Thanks in advance -- Jurgis Pralgauskis omni: 8-616 77613; teledema: 8-657 65656; jabber: [EMAIL PROTECTED]; skype: dz0rdzas; Don't worry, be happy and make things better ;) --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Why does "==" not return True or False?
Hello, > > If not ==, what would you propose for creating symbolic expression > > objects? The other obvious choice is eq(f, g), but I think that this > > is inferior since it is much harder to guess. > > How often does one need an equation *outside solve*? I never did! > So, if one really wants an equation as an object, why not eq(f,g)? > > And if one wants to use solve, why not in that way: > sage: solve(x^2,'=',2,x) # solves x^2=2 > sage: solve(x^2,'<',2,x) # solves x^2<2 well, inequalities would also have this kind of confusion (as Simon described in the first mail).. http://groups.google.com/group/sage-support/t/dc9a94da8d930999 so probably more general markup way should be found for symbolic equations/inequalities or left as it is maybe some `==, `<, `> notation or other symbol instead of '== '< '> _== _<_> ' would make most sense in symbolic stuff as it is usually used with "symbols" :), but don't know if interpreter won't get confused ps: can SAGE solve inequality (as the one here) http://www.sagemath.org/doc/html/ref/module-sage.calculus.wester.html sais NO (what is so difficult about inequalities - at least the school level ones) --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Why does "==" not return True or False?
Hello, > > > In this > > > system, "==" is used to create equations, not to test equality. > > > > That's nasty! for me that also seems potential source of confusion maybe "===" would be better for equations? as much as I remember, maxima uses "=", so "==" also doesn't help maxima users a lot.. --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~--~~~~--~~--~--~---
[sage-support] Re: Fwd: sage logo page?
an idea (based on http://sagemath.org/art/.html/sage-bg1-thumb.jpg) http://moodle.projektas.lt/failai/sage/ I'd like to show some kind of convergation.., and as usulay in OS communities - some kind of circle :) On 9/4/07, mabshoff <[EMAIL PROTECTED]> wrote: > > > > On Sep 3, 11:02 pm, "William Stein" <[EMAIL PROTECTED]> wrote: > > David Joyner has a really good idea below. Any volunteers? > > > > -- Forwarded message -- > > From: David Joyner <[EMAIL PROTECTED]> > > Date: Sep 3, 2007 12:56 PM > > Subject: sage logo page? > > To: William Stein <[EMAIL PROTECTED]> > > > > Cc: David Joyner <[EMAIL PROTECTED]> > > > > Hi William: > > I wonder if at some point an analog ofhttp://www.python.org/community/logos/ > > could be created for SAGE. I'm not saying > > people couldn't use the SAGE art. Just, it would be > > nice I think to have a page which lists the logos > > which the SAGE Group has a copyright for and > > encourages the use of. > > - David > > > > Not me, I own enough open ticket ;), but we should also recreate the > snapshot page we used to have before the last web page redesign. I am > also cross posting this to sage-support, there might be gifted people > over there willing to help out. > > Cheers, > > Michael > > > > > -- Jurgis Pralgauskis mob.: 865-765-656, +37061677613; skype: dz0rdzas; Don't worry, be happy :) and make things better ;) reikalaukime ATVIRŲ ir nepriklausomų STANDARTŲ: http://www.noooxml.org/petition-lt http://www.openstandards.eu/ --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://sage.math.washington.edu/sage/ and http://sage.scipy.org/sage/ -~--~~~~--~~--~--~---
[sage-support] calculus tutor (step by step)
Hello, I saw yacas mentioned here and there with sage http://www.mail-archive.com/[EMAIL PROTECTED]/msg04521.html http://www.sagemath.org:9001/Software I think yacas would be useful to construct step-by-step solvers for teaching/exercising purpose http://www.google.lt/search?q=Student[Calculus1]+ShowSteps as it introduces itself as "a do-it-yourself symbolic algebra environment" http://yacas.sourceforge.net/essaysmanual.html The interpreter provides a high-level weakly typed functional language designed for quick prototyping of computer algebra algorithms, but the language is suitable for all kinds of symbolic manipulation. More details: It supports conditional term rewriting of symbolic expression trees, closures (pure functions) and delayed evaluation, dynamic creation of transformation rules, arbitrary-precision numerical calculations, and flexible user-defined syntax using infix notation. Their syntax is more pleasant than of LISP - as they say, lots of syntatic sugar :) does anyone else thnk it would be useful? ps.: other alternative may be to get expression tree representation prefix notation is a good start... http://www.math.utexas.edu/pipermail/maxima/2006/003538.html and parse it myself with python/sage (probably regex or so...) but yacas already has nice things in pattern description as y_IsFreeOf(x) -- Jurgis Pralgauskis mob.: 865-765-656, +37061677613; skype: dz0rdzas; Don't worry, be happy :) and make things better ;) --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://sage.math.washington.edu/sage/ and http://sage.scipy.org/sage/ -~--~~~~--~~--~--~---
[sage-support] Re: beginner friendly notebook exaple
maybe just some clear link to several common examples would be OK lets say: function plot, equation, some integration and diff-equation math teachers/students would find it nice :) On 8/10/07, William Stein <[EMAIL PROTECTED]> wrote: > > On 8/9/07, Jurgis Pralgauskis <[EMAIL PROTECTED]> wrote: > > Hello, > > > > I gave a http://www.sagenb.org/ link to some of my math coleagues, > > but they said, thet didn't understand anything there.. > > That's unfortunate. > > > Personaly the earlier notebook interface was more attractive > > (understandable for me as well) > > It was vastly less secure, less organized, slower, and major > hacks (like restarting the whole server every five minutes) were > required to keep it running. And it would grind to a halt if very many > people used it at once. The new vesion is also snappier, and > most people report that they prefer it. > > > is it possible to have instance of oldstyle notebook - as sandbox, for > > the math-teachers, who are at least a bit curious but won't try once > > more if impression is strange/misleading > > (they even might not understand what is "Site sertificate" :/) > > The old notebook -- as it was -- doesn't exist in the new versions of SAGE. > However, anybody with SAGE run their *own* notebook server, and the > default configuration > is very insecure and doesn't require logins, like the old notebook. > > In short, the old notebook was quite insecure, not robust, and > would easily allow people to vandalize my server without any > accountability. I can't run such a notebook service > on my hardware anymore (because of University rules). I hope you understand. > > If you are anybody else would like to volunteer to run such a server, that > might be nice... > > > > > > anyway very nice work, thanks :) > > -- > > Jurgis Pralgauskis > > mob.: 865-765-656, +37061677613; skype: dz0rdzas; > > Don't worry, be happy :) and make things better ;) > > > > > > > > > > -- > William Stein > Associate Professor of Mathematics > University of Washington > http://www.williamstein.org > > > > -- Jurgis Pralgauskis mob.: 865-765-656, +37061677613; skype: dz0rdzas; Don't worry, be happy :) and make things better ;) --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://sage.math.washington.edu/sage/ and http://sage.scipy.org/sage/ -~--~~~~--~~--~--~---
[sage-support] beginner friendly notebook exaple
Hello, I gave a http://www.sagenb.org/ link to some of my math coleagues, but they said, thet didn't understand anything there.. Personaly the earlier notebook interface was more attractive (understandable for me as well) is it possible to have instance of oldstyle notebook - as sandbox, for the math-teachers, who are at least a bit curious but won't try once more if impression is strange/misleading (they even might not understand what is "Site sertificate" :/) anyway very nice work, thanks :) -- Jurgis Pralgauskis mob.: 865-765-656, +37061677613; skype: dz0rdzas; Don't worry, be happy :) and make things better ;) --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://sage.math.washington.edu/sage/ and http://sage.scipy.org/sage/ -~--~~~~--~~--~--~---
[sage-support] sage.scipy.org interactive tutorial link broken?
"Interactive Tutorial" from sage homepage http://sage.math.washington.edu:8101/doc_browser?/tut/?tut.html says connection timed out :\ I can use http://www.sagenb.org//doc_browser?/tut/?tut.html but newcommers might get dissapointed in the misunderstanding -- Jurgis Pralgauskis mob.: 865-765-656, +37061677613; skype: dz0rdzas; Don't worry, be happy :) and make things better ;) --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://sage.math.washington.edu/sage/ and http://sage.scipy.org/sage/ -~--~~~~--~~--~--~---
[sage-support] Re: SAGE TA ?
yes, and it could also link to the theory from textbook (rule, definition or so) On 3/31/07, Timothy Clemans <[EMAIL PROTECTED]> wrote: > > For your off topic are you saying that you want some interactive > program that shows all the steps for solving some problem and then > guides the student through the steps? > > On 3/31/07, Jurgis Pralgauskis <[EMAIL PROTECTED]> wrote: > > > > Hello, > > > > there's aproject, which intends to join many math testing tools > > http://maths.york.ac.uk/serving_maths/ > > and even proposes some protocol (and server power) for answer analysis > > http://mantis.york.ac.uk/moodle/course/view.php?id=14 > > > > OT: I dream about some way to show incremental problem solving > > algorithms are in math text-books ;) > > It can propose to solve problems for students themself, and if they > > get stuck in some step, SAGE gives hint or just does this step > > this would be kind of expert system, as there are usually several > > paths to achieve the same - may be someone has more clear ideas, how > > this could be implemented? > > > > > > On 3/26/07, Joel B. Mohler <[EMAIL PROTECTED]> wrote: > > > > > > On Monday 26 March 2007 07:44, Nikos Apostolakis wrote: > > > > Hello group, > > > > > > > > has anybody tried to implement something like "Maple TA" in sage? > > > > For example I would like to have students take placement exams with > > > > "free form" answers. > > > > > > > > In case you don't know what Maple TA is: > > > > > > Actually, if your goal is to have something opensource, there are already > > > other opensource alternatives: > > > http://www.lon-capa.org/ --- I'm not sure what it uses > > > http://stack.sourceforge.net/ --- uses maxima in the backend > > > If your goal in something SAGEy, that's another issue. > > > > > > To my eyes, lon-capa is the most sensible of all of them I've seen. They > > > have > > > a CD which you pop into a computer purchased *solely* for this. It > > > installs > > > their opensource stuff and away you go. It also appears to come with > > > question banks. This fixes two problems which I think a lot of people > > > underestimate -- 1) there is a very heavy server load for a decent sized > > > class and 2) coming up with *debugged* question banks is a lot of work. > > > > > > -- > > > Joel > > > > > > > > > > > > > > > > -- > > Jurgis Pralgauskis > > mob.: +37061677613; JabberID: [EMAIL PROTECTED]; skype: dz0rdzas; > > Don't worry, be happy :) and make things better ;) > > > > > > > > > > > -- Jurgis Pralgauskis mob.: +37061677613; JabberID: [EMAIL PROTECTED]; skype: dz0rdzas; Don't worry, be happy :) and make things better ;) --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://sage.math.washington.edu/sage/ and http://sage.scipy.org/sage/ -~--~~~~--~~--~--~---
[sage-support] Re: SAGE TA ?
Hello, there's aproject, which intends to join many math testing tools http://maths.york.ac.uk/serving_maths/ and even proposes some protocol (and server power) for answer analysis http://mantis.york.ac.uk/moodle/course/view.php?id=14 OT: I dream about some way to show incremental problem solving algorithms are in math text-books ;) It can propose to solve problems for students themself, and if they get stuck in some step, SAGE gives hint or just does this step this would be kind of expert system, as there are usually several paths to achieve the same - may be someone has more clear ideas, how this could be implemented? On 3/26/07, Joel B. Mohler <[EMAIL PROTECTED]> wrote: > > On Monday 26 March 2007 07:44, Nikos Apostolakis wrote: > > Hello group, > > > > has anybody tried to implement something like "Maple TA" in sage? > > For example I would like to have students take placement exams with > > "free form" answers. > > > > In case you don't know what Maple TA is: > > Actually, if your goal is to have something opensource, there are already > other opensource alternatives: > http://www.lon-capa.org/ --- I'm not sure what it uses > http://stack.sourceforge.net/ --- uses maxima in the backend > If your goal in something SAGEy, that's another issue. > > To my eyes, lon-capa is the most sensible of all of them I've seen. They have > a CD which you pop into a computer purchased *solely* for this. It installs > their opensource stuff and away you go. It also appears to come with > question banks. This fixes two problems which I think a lot of people > underestimate -- 1) there is a very heavy server load for a decent sized > class and 2) coming up with *debugged* question banks is a lot of work. > > -- > Joel > > > > -- Jurgis Pralgauskis mob.: +37061677613; JabberID: [EMAIL PROTECTED]; skype: dz0rdzas; Don't worry, be happy :) and make things better ;) --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://sage.math.washington.edu/sage/ and http://sage.scipy.org/sage/ -~--~~~~--~~--~--~---
[sage-support] sage_eval bug?
expression = 'y+2*y*x+a'
f3 = sage_eval( expression, locals={'y':4, 'a':x} )
shows: 9x+4
f4 = sage_eval( expression, locals={'y':4, 'a':a} )
says
> Traceback (most recent call last):
> f4 = sage_eval( expression, locals={'y':4, 'a':a} )
> NameError: name 'a' is not defined
--~--~-~--~~~---~--~~
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[sage-support] expression parse tree (API) ?
Hello, does anyone knows how to access the formula parse tree I found sth similar what I want in java.. http://www.singularsys.com/jep/doc/html/advanced.html what I really want, is to make derivative exercise tool.. which would do the differentiation of (complex) formulas step by step acctually I would need a parse tree according to one given variable, let's say _x_ where the each depth-node would mean one of known derivative formulas and + would be parallel/linear node http://en.wikipedia.org/wiki/Derivative#Rules_for_finding_the_derivative sin(2*x) + x^2 should give: + sin->*2->x + ^2 -> x having this form, I could handle derivation steps flexibly.. :) I know python has powerfull parse tools, but I don't want to invent bicycle, I'd rather hack it :) I found some abandoned project http://www.strout.net/python/pythonica.html but I hope if not sage, then mayby Axiom or Maxima has sth similar.. Thanks for the answers in adwance :) ps.: there's still some thoughts about f(x)*g(x), which should be worked out as f'*g + f*g' and i still don't quite know/remember how to handle x^x --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://sage.math.washington.edu/sage/ and http://sage.scipy.org/sage/ -~--~~~~--~~--~--~---
[sage-support] ordinary POST/GET requests to Sage server
Hello, I am new to sage, and I want to make webpage with some some predefined set/type of math (calculus) problems, where users just enter coeffitiens, and then get the answers... how I imagine this: S) I'd run sage on my home computer (can think as sage server) Q) and use some ordinary server space provider for my site I make the UI site with some php+mysql (as I know them well) on Q, and then I would 1) formulate the problems to sage (compile the problem templates with the coefitients) (Q) 2) send them to sage (Q->S) 3) compute the answer (S) 4) get the answer (S->Q) 5) show/send it to the user (Q) I know the notebook, it uses Ajax, but I am not familiar with this technology I need action whe I could feed/receive POST/GET data .. even if the calculations would take long (though in my case they shouldn't), first I could feed problem via POST, and get back some proces_ID, and then I could make request with that ID later, and learn the answer.. could You direct me to some examples or docs Thanks in advance :) -- Jurgis Pralgauskis Don't worry, be happy :) and make things better ;) --~--~-~--~~~---~--~~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://sage.math.washington.edu/sage/ and http://sage.scipy.org/sage/ -~--~~~~--~~--~--~---
