Re: [sympy] Re: Google Season of Docs

The org applications for Google Season of Docs are now open. https://developers.google.com/season-of-docs/docs/get-started/. The deadline is April 23 which is in about two weeks. Jason, we should schedule a time to work on it. If anyone else is interested in helping let me know. Aaron

Re: [sympy] Subclassing sympy symbols and functions to attach additional attributes

In that case, it would be better to model your object after Predicate and AppliedPredicate, which work the same way (except in Boolean expressions). Aaron Meurer > On Feb 5, 2016, at 5:37 PM, Bogdan Opanchuk wrote: > > Hi Aaron, > > Thank you for your reply. > >> If you

Re: [sympy] Symbolic probability expression

It seems like a good idea to me. There are some identities that hold for variance and covariance independent of the probability distribution and it would be cool to be able to apply those identities symbolically. Aaron Meurer > On Dec 15, 2015, at 11:05 AM, Francesco Bonazzi

Re: [sympy] Re: Windows, 0.7.6, fourier_transform error

The exe installer is built using the standard setup.py command. bdist_win32 or something like that. By the way, I forgot that Matthew Brett has a bot that should have build Windows installers for this release. I'll need to check on it and see if they work. Aaron Meurer On Nov 26, 2014, at

Re: [sympy] init_printing() in IPython Notebook should do use_latex=True

On Mar 4, 2014, at 9:57 PM, Ondřej Čertík ondrej.cer...@gmail.com wrote: On Tue, Mar 4, 2014 at 6:47 PM, Aaron Meurer asmeu...@gmail.com wrote: You should use SymPy 0.7.5. There were some issues with init_printing() in recent older versions, but they should have all been straightened out.

Re: [sympy] Re: Issue migration from Google Code to GitHub

Yes, let's get it done. Should I freeze the google code issues? Aaron Meurer Sent from my iPhone. On Mar 5, 2014, at 11:11 AM, Ondřej Čertík ondrej.cer...@gmail.com wrote: On Wed, Mar 5, 2014 at 10:02 AM, Sergey B Kirpichev skirpic...@gmail.com wrote: On Wed, Mar 05, 2014 at 09:20:52AM

Re: [sympy] Discussion regarding the series expansion project

All I remember was that there was an introduction in another language (French possibly), and it was on a mailing list discussion with Tom. I can probably find it with a little searching when I get to my computer. Aaron Meurer Sent from my iPhone. On Feb 26, 2014, at 6:51 PM, someone

Re: [sympy] Re: Happy Holidays !!!!!

Merry Christmas to all. I added a little surprise to the website, courtesy of Anna Bujak (one of our GCI students).  Aaron Meurer On Dec 24, 2013, at 10:58 PM, Manoj Kumar manojkumarsivaraj...@gmail.com wrote: Thanks and Happy Hoildays to everyone :) -- You received this message

Re: [sympy] Re: 2to3 script appears to be missing a conversion

docscrape currently only works in python 2. We need to backport the python 3 version. The compatibility one is probably not an issue. The rest likely are. By the way, running pyflakes in python 3 and looking for undefined variables might uncover more of these issues. Aaron Meurer Sent from

Re: [sympy] ODE code generation

Assumedly if it doesn't, then you would be able to tell just by applying the sympy cse and seeing if it makes a significant difference in the run time. Aaron Meurer On Nov 5, 2013, at 6:45 PM, Matthew Rocklin mrock...@gmail.com wrote: Sadly I'm not an expert in C compilers and I no longer

Re: [sympy] default_sort_key does not always reproduce behavior of sort()

I don't think the key makes any guarantees, other than that the prefer will be platform and python version independent. It also should be very hard to produce two different objects with the same key. It was probably originally designed to give the same ordering to reduce the pain of

Re: [sympy] Test failure in 0.7.0 pysics.quantum.matrixcache

On Jun 22, 2011, at 8:51 AM, Ondrej Certik wrote: On Wed, Jun 22, 2011 at 12:09 AM, Aaron Meurer asmeu...@gmail.com wrote: So far, I've coded up an import_module function, that wraps the try, except ImportError logic into a single unified function. It has support for checking the module

Re: [sympy] Graph thoery in sympy

During some of the discussions from GSoC, we decided that reimplementing one of the dozen of graph theory modules (including networkx) in SymPy would be a waste of time. However, if the graph theory were done in a symbolic way, so that it would really require SymPy to be implemented, then I

Re: [sympy] Perpendicular distance from Point to Line

I think he was not using the git version at all. To get those features Chris mentioned, you need to use the development version, or else use the 0.7.0 version that will be coming out in a few days. Aaron Meurer On Jun 22, 2011, at 5:57 AM, Chris Smith wrote: Sometimes you have two sympy

Re: [sympy] Test failure in 0.7.0 pysics.quantum.matrixcache

On Jun 22, 2011, at 6:55 AM, Ted Horst wrote: Seem like it would be more consistent to raise an ImportError rather than return None. That would also mean less change to existing code. That would defeat the whole purpose of the function, except when we need to check for versions or you

Re: [sympy] SymPy simplification. Distinct simplifications for group, ring, field, reals etc?

Hi. I'm not sure if it will be the same as how you envision this to work, but these are all supported in SymPy: In [7]: a, b = symbols('a b', commutative=False) In [8]: a*b - b*a Out[8]: a⋅b - b⋅a Note the symbols are complex by default. In [9]: x = Symbol('x') In [10]: sqrt(x**2) Out[10]:

Re: [sympy] Poly*Expr

Well, the thing that bugs me the most is that you can do the same things with what would appear to be rational functions: In [7]: Poly(1/x) Out[7]: Poly(1/x, 1/x, domain='ZZ') In [8]: Poly(1/x)*x Out[8]: Poly(x*1/x, 1/x, domain='ZZ[x]') In [9]: Poly(1/x)*x - 1 Out[9]: Poly(x*1/x - 1, 1/x,

Re: [sympy] Problem with evaluating rotation operator

On Jun 16, 2011, at 11:17 PM, Ondrej Certik wrote: On Thu, Jun 16, 2011 at 10:06 PM, Aaron Meurer asmeu...@gmail.com wrote: On Thu, Jun 16, 2011 at 11:00 PM, Ondrej Certik ondrej.cer...@gmail.com wrote: On Thu, Jun 16, 2011 at 8:34 PM, Ondrej Certik ondrej.cer...@gmail.com wrote: On Thu,

Re: [sympy] Poly*Expr

Meurer On Jun 16, 2011, at 6:19 PM, Aaron S. Meurer wrote: Well, the thing that bugs me the most is that you can do the same things with what would appear to be rational functions: In [7]: Poly(1/x) Out[7]: Poly(1/x, 1/x, domain='ZZ') In [8]: Poly(1/x)*x Out[8]: Poly(x*1/x, 1/x, domain='ZZ[x

Re: [sympy] Possible Code Sprint Next Week?

Sorting by the number of comments does't seem to be implemented, so I created http://code.google.com/p/support/issues/detail?id=5446. Aaron Meurer On Jun 14, 2011, at 12:58 AM, Aaron Meurer wrote: This already exists. The star is a way for users to vote for issues. The issue tracker is set

Re: [sympy] isympy in newest ipython

There's a sample script at http://code.google.com/p/sympy/issues/detail?id=1797. I don't know if it's still relevant. Aaron Meurer On Jun 13, 2011, at 12:31 AM, Ondrej Certik wrote: Hi, when I try to import isympy in the newest ipython (installed in Qsnake from qsnake.com), I get:

Re: [sympy] Possible Code Sprint Next Week?

I think SymPy fits this need. It only really requires git and Python to develop in (though depending on what you are doing, you may need other tools as well). And since it is written in Python, the deveopment turnover time is fast, meaning that you can get a lot done in a sprint. Our issue

[sympy] Re: SymPy 0.7.0 Release Candidate 1

Well, I just noticed that sympy does not import under Python 2.4. I have fixed this in the 0.7.0 branch. Please report any other problems that you find, and I'll roll them out into a 0.7.0.rc2. Aaron Meurer On Jun 11, 2011, at 11:48 PM, Aaron Meurer wrote: After weeks of work, and more

[sympy] Warning in numpy tests

If you have numpy installed, then you will get the following sympy/test_external/test_numpy.py[20] Warning: invalid value encountered in power [OK] This is because the test tests array([3, 8, -1])**5.5 and the -1**5.5 gives that error. Can this be

Re: [sympy] bugs in units

See the issue page. It has something to do with the new default lexicographic ordering for printing. Aaron Meurer On Jun 8, 2011, at 2:20 AM, Luke wrote: I was writing some documentation for physics/units.py and discovered some infinite recursion RuntimeError: from sympy.physics.units

Re: [sympy] Why is Symbol subclassed from Boolean?

I think it's so that we can use symbols in boolean expressions, like In [2]: x y Out[2]: x ∧ y But I think this is a bad design. We should rather have a BooleanSymbol to do this. Aaron Meurer On Jun 8, 2011, at 2:41 PM, krastanov.ste...@gmail.com wrote: Why is it necessary? -- You

Re: [sympy] Solving f(x) congruent to 0 mod (n)

On Mon, Jun 6, 2011 at 3:06 PM, Hector hector1...@gmail.com wrote: On Tue, Jun 7, 2011 at 1:04 AM, Aaron S. Meurer asmeu...@gmail.com wrote: On Jun 6, 2011, at 10:44 AM, Hector wrote: On Tue, Mar 29, 2011 at 5:42 AM, Mateusz Paprocki matt...@gmail.com wrote: Hi

Re: [sympy] Pull Requests

You should submit a pull request only if you feel that your code is ready to be merged in. So 2. If you just want feedback, you can write to the list with a link to your branch on GitHub. It's even possible for people to leave comments on lines of code without you creating a pull request.

Re: [sympy] Question about diff() and Derivative()

This has actually been discussed quite a bit before (a lot of people want to use Lagrangians). You can search the mailing list. From what I've seen, you will either have to write your own custom diff routine or do clever substitution of functions and derivatives with symbols. I don't think

Re: [sympy] Re: repr and srepr

On Jun 1, 2011, at 9:35 PM, Ronan Lamy wrote: Le mercredi 01 juin 2011 à 20:12 -0600, Aaron Meurer a écrit : A few things: - Even if we made isympy play nice, doctests assume just a regular pure Python shell. So any doctest of a function that somehow has a list, tuple, or dict of sympy

Re: [sympy] Re: Borrowing ideas from Polys to Matrix

On May 31, 2011, at 11:11 AM, Ronan Lamy wrote: Le mardi 31 mai 2011 à 09:43 -0700, Vinzent Steinberg a écrit : On May 30, 9:52 pm, Mateusz Paprocki matt...@gmail.com wrote: That could work: ZZ.sum([1, 2, 3]) - sum([1, 2, 3]) RR.sum([1.0, 2.0]) - mpmath.fsum([1.0, 2.0]) EX.sum([x, y, z])

Re: [sympy] Borrowing ideas from Polys to Matrix

In [1] you will find a very simple comparison of Integer, int and mpz. This applies to the rational case as well, just the difference is even bigger. Did you make those graphs manually, or do you have some program that automates it? It would be nice to have something that can make timing

Re: [sympy] Re: A simple idea regarding groundtypes for Matrix

On Jun 2, 2011, at 9:48 AM, Brian Granger wrote: On Thu, Jun 2, 2011 at 1:28 AM, Mateusz Paprocki matt...@gmail.com wrote: Hi, On 2 June 2011 04:09, Brian Granger elliso...@gmail.com wrote: Is there a link somewhere to documentation about the groundtypes in polys? I am interested why

Re: [sympy] Re: A simple idea regarding groundtypes for Matrix

On Jun 2, 2011, at 10:13 AM, sherjiloz...@gmail.com wrote: Yes and no and no. Numpy/scipy matrices have their backend in C/fortran types. Arbitrary objects can't be put inside them. That's where sympy comes in and finds a market for its use. I'm adding a dtype(the usgae of this name

Re: [sympy] Solving equations with exp

Yeah, it would be cool to have assumptions for functions. Stuff like one-to-one, onto, increasing, strictly increasing (implies one-to-one), continuous, etc. Aaron Meurer On Jun 2, 2011, at 12:52 PM, Christophe BAL wrote: Hello. On the other hand, maybe solve should be able to tell

Re: [sympy] Re: Problem with user-defined functions

This is indeed a very interesting application of SymPy. Here we see one example of the power of symbolic computer algebra systems, which is that symbolic preprocessing, even very simple preprocessing like what we have here, can greatly optimize arbitrary code execution. If your expressions

Re: [sympy] Re: Problem with user-defined functions

Is there a specific reason why you want to use evalf() to do your lookups, or is it just because you want something that will recurse down the expression tree? Aaron Meurer On Jun 2, 2011, at 2:10 PM, luke wrote: My bad, sorry for my inexperience with sympy, final code: (this is really

Re: [sympy] Re: Borrowing ideas from Polys to Matrix

On Jun 2, 2011, at 9:21 PM, Ronan Lamy wrote: Le jeudi 02 juin 2011 à 17:07 -0600, Aaron S. Meurer a écrit : On May 31, 2011, at 11:11 AM, Ronan Lamy wrote: Le mardi 31 mai 2011 à 09:43 -0700, Vinzent Steinberg a écrit : On May 30, 9:52 pm, Mateusz Paprocki matt...@gmail.com wrote

Re: [sympy] Re: Borrowing ideas from Polys to Matrix

On Jun 2, 2011, at 10:09 PM, Ronan Lamy wrote: Le jeudi 02 juin 2011 à 21:28 -0600, Aaron S. Meurer a écrit : On Jun 2, 2011, at 9:21 PM, Ronan Lamy wrote: Le jeudi 02 juin 2011 à 17:07 -0600, Aaron S. Meurer a écrit : On May 31, 2011, at 11:11 AM, Ronan Lamy wrote: Le mardi 31 mai 2011

Re: [sympy] integer_nthroot and factorint - iroot and ifactor

I don't think it's worth it. Aaron Meurer On May 26, 2011, at 11:59 PM, smichr wrote: What do you think about changing the names integer_nthroot and factorint - iroot and ifactor? -- You received this message because you are subscribed to the Google Groups sympy group. To post to this

Re: [sympy] why does terms_gcd clear the denominators of an expression

Shouldn't it return 1? Aaron Meurer On May 27, 2011, at 3:14 PM, smichr wrote: There are two questions, really: 1) why does gcd(2/3, 4/9) give 2/9 instead of (the greater) 2/3? I know what the code is doing...but should it be doing that? I read that This definition is consistent with

Re: [sympy] Re: Random Variables

You might also look at the discussion at http://code.google.com/p/sympy/issues/detail?id=135. We used to override __eq__ to retune Eq(), but we changed it to be like it is now. You can see at around comment 22 that the main reason for the change was for performance purposes. But I would

Re: [sympy] sympy + mpmath findroot

If I try this with mpmath 0.16 (the version we currently have in sympy in the latest git master), I get: In [22]: print 'subs: ', mpmath.findroot(lambda xi: p.subs(x, xi), 1.0) subs: --- ValueError

Re: [sympy] sympy + mpmath findroot

. Thanks again, Matt On Thu, May 26, 2011 at 08:28:51PM -0600, Aaron S. Meurer wrote: If I try this with mpmath 0.16 (the version we currently have in sympy in the latest git master), I get: In [22]: print 'subs: ', mpmath.findroot(lambda xi: p.subs(x, xi), 1.0) subs

Re: [sympy] deleted ode test

That is a very old commit. If the reduction was hard, then it was probably moved to an XFAIL test. Are you sure it isn't in one of those? Aaron Meurer On May 24, 2011, at 8:28 PM, Chris Smith wrote: e12fb20c2405b4fdcac8dff980c0b6637c46ec06 -- You received this message because you are

Re: [sympy] polys domain woes

What happens if you make it use an algebraic domain, i.e., set extension=True? Aaron Meurer On May 24, 2011, at 10:14 PM, smichr wrote: One of the problems I am running into with polys is this: p1,p2=[(x - 5)**2 + (y - 5)**2 - 4, -(-x + 5)*(-x - 2*2**(1/ S(2)) + 5) - (-y + 5)*(-y +

Re: [sympy] polys domain woes

On May 25, 2011, at 3:01 AM, Mateusz Paprocki wrote: Hi, On 25 May 2011 10:43, Aaron S. Meurer asmeu...@gmail.com wrote: What happens if you make it use an algebraic domain, i.e., set extension=True? That's a good suggestion. Usually polys (domains or whatever else) in not the problem

Re: [sympy] Cancel with floating point numbers

That's basically correct. The problem is that certain polynomial algorithms (in this case, polynomial division) rely on the ability to determine zero equivalence in the coefficients. But floating point numbers, as we all know, have the problem where they will often give something like 1e-14

Re: [sympy] deleted ode test

What is the SHA1 of the commit? Aaron Meurer On May 24, 2011, at 3:38 PM, smichr wrote: I see that a test which is proving difficult to verify was deleted in the commit that made this change: def test_1st_homogeneous_coeff_ode2(): eq1 = f(x).diff(x) - f(x)/x+1/sin(f(x)/x) eq2 =

Re: [sympy] Singleton Inequalities

Hi. On May 24, 2011, at 5:50 PM, Matthew Rocklin wrote: Hi Everyone, I'm revamping Sets a bit as a precursor to my GSoC project. The first part of this is creating a FiniteSet object to go along with Intervals (like (0, 1] ) and Unions (like [-1,0) U (0, 1] ). I changed the default

Re: [sympy] Re: Singleton Inequalities

matt...@gmail.com wrote: Hi, On 24 May 2011 17:42, Aaron S. Meurer asmeu...@gmail.com wrote: Hi. On May 24, 2011, at 5:50 PM, Matthew Rocklin wrote: Hi Everyone, I'm revamping Sets a bit as a precursor to my GSoC project. The first part of this is creating a FiniteSet

[sympy] Re: Google Summer of Code has Started

Just a reminder to students that this means that you need to blog at some point this week. You don't have to do it until the end of the day on Saturday. But it's just a reminder that it needs to be done. If you don't have anything to blog about because you haven't done much yet, then a

Re: [sympy] os invariant?

On May 22, 2011, at 9:31 PM, Renato Coutinho wrote: On Mon, May 23, 2011 at 12:28 AM, Mateusz Paprocki matt...@gmail.com wrote: Hi, On 23 May 2011 05:18, smichr smi...@gmail.com wrote: Will list(e.free_symbols) be OS independent? .free_symbols is implemented using sets so it is

Re: [sympy] Ideas for extending Mul

On May 22, 2011, at 7:43 PM, Andy Ray Terrel wrote: On Sun, May 22, 2011 at 7:27 PM, Aaron S. Meurer asmeu...@gmail.com wrote: On May 22, 2011, at 12:12 PM, Mateusz Paprocki wrote: Hi, On 22 May 2011 18:17, Aaron S. Meurer asmeu...@gmail.com wrote: Is it possible to implement x*y*z

Re: [sympy] os invariant?

On May 23, 2011, at 12:40 PM, Chris Smith wrote: Aaron S. Meurer wrote: On May 22, 2011, at 9:31 PM, Renato Coutinho wrote: On Mon, May 23, 2011 at 12:28 AM, Mateusz Paprocki matt...@gmail.com wrote: Hi, On 23 May 2011 05:18, smichr smi...@gmail.com wrote: Will list(e.free_symbols

Re: [sympy] os invariant?

On May 23, 2011, at 12:49 PM, Mateusz Paprocki wrote: Hi, On 23 May 2011 20:46, Aaron S. Meurer asmeu...@gmail.com wrote: On May 23, 2011, at 12:40 PM, Chris Smith wrote: Aaron S. Meurer wrote: On May 22, 2011, at 9:31 PM, Renato Coutinho wrote: On Mon, May 23, 2011 at 12:28 AM

Re: [sympy] Re: syntax for results of solve and dsolvev

On May 22, 2011, at 9:50 AM, Chris Smith wrote: Ronan Lamy wrote: Le dimanche 22 mai 2011 à 14:38 +0545, Chris Smith a écrit : I think that sets make more sense, too, but it's useful to have the variables in the output, and dicts are the easiest way to handle

Re: [sympy] Re: syntax for results of solve and dsolvev

On May 23, 2011, at 4:43 PM, Ronan Lamy wrote: Le lundi 23 mai 2011 à 12:53 -0600, Aaron S. Meurer a écrit : On May 22, 2011, at 9:50 AM, Chris Smith wrote: Ronan Lamy wrote: Le dimanche 22 mai 2011 à 14:38 +0545, Chris Smith a écrit : I think that sets make more sense, too

Re: [sympy] Re: syntax for results of solve and dsolvev

On May 23, 2011, at 6:23 PM, Ronan Lamy wrote: Le lundi 23 mai 2011 à 18:01 -0600, Aaron S. Meurer a écrit : On May 23, 2011, at 4:43 PM, Ronan Lamy wrote: Le lundi 23 mai 2011 à 12:53 -0600, Aaron S. Meurer a écrit : On May 22, 2011, at 9:50 AM, Chris Smith wrote: Ronan Lamy wrote: Le

Re: [sympy] imposing commutation relation

Hi. On May 23, 2011, at 10:55 PM, Rajeev Singh wrote: Hi, I asked this question on sage mailing list already and it seems appropriate to ask here as well. I wish to simplify some calculation that appear in quantum mechanics. To begin we use non-commutative variables as - sage: x, y =

Re: [sympy] imposing commutation relation

+ 2⋅y⋅x The output below was from the latest development branch, and will be present in the next release. Aaron Meurer On May 23, 2011, at 11:06 PM, Aaron S. Meurer wrote: Hi. On May 23, 2011, at 10:55 PM, Rajeev Singh wrote: Hi, I asked this question on sage mailing list already

Re: [sympy] planet.sympy.org update

On May 21, 2011, at 10:10 PM, Ondrej Certik wrote: Hi, I have refactored all the code running planet.sympy.org and it is now fully hosted by github. The repository is here: https://github.com/sympy/planet.sympy.org see the README for information how it works. The blogs subscriptions

Re: [sympy] planet.sympy.org update

On May 22, 2011, at 9:47 AM, Aaron S. Meurer wrote: On May 21, 2011, at 10:10 PM, Ondrej Certik wrote: Hi, I have refactored all the code running planet.sympy.org and it is now fully hosted by github. The repository is here: https://github.com/sympy/planet.sympy.org see

Re: [sympy] Re: Remove _op_priority before the release?

On May 22, 2011, at 9:34 AM, Andy Ray Terrel wrote: On Sat, May 21, 2011 at 10:51 PM, Ondrej Certik ond...@certik.cz wrote: On Sat, May 21, 2011 at 8:21 PM, Andy Ray Terrel andy.ter...@gmail.com wrote: On Sat, May 21, 2011 at 10:10 PM, Ronan Lamy ronan.l...@gmail.com wrote: Le samedi 21

Re: [sympy] Ideas for extending Mul

Is it possible to implement x*y*z as reduce(operator.mul, [x, y, z])? Aaron Meurer On May 21, 2011, at 9:11 PM, Andy Ray Terrel andy.ter...@gmail.com wrote: My experience with developing languages in Ignition, is largely the same as what Brian outlined. Another solution though is to

Re: [sympy] Ideas for extending Mul

On May 22, 2011, at 12:12 PM, Mateusz Paprocki wrote: Hi, On 22 May 2011 18:17, Aaron S. Meurer asmeu...@gmail.com wrote: Is it possible to implement x*y*z as reduce(operator.mul, [x, y, z])? It works: In [2]: import operator In [3]: reduce(operator.mul, [x, y, z]) Out[3]: x⋅y⋅z

Re: [sympy] Ideas for extending Mul

On May 22, 2011, at 5:16 PM, Andy Ray Terrel wrote: On Sun, May 22, 2011 at 1:49 PM, Andy Ray Terrel andy.ter...@gmail.com wrote: On Sun, May 22, 2011 at 1:12 PM, Mateusz Paprocki matt...@gmail.com wrote: Hi, On 22 May 2011 18:17, Aaron S. Meurer asmeu...@gmail.com wrote

Re: [sympy] planet.sympy.org update

On May 22, 2011, at 11:12 AM, Ondrej Certik wrote: On Sun, May 22, 2011 at 8:47 AM, Aaron S. Meurer asmeu...@gmail.com wrote: On May 21, 2011, at 10:10 PM, Ondrej Certik wrote: Hi, I have refactored all the code running planet.sympy.org and it is now fully hosted by github

Re: [sympy] Wolfram|Alpha

This is kind of similar to the oeis() function (issue 2203). Maybe we should create a module for these kinds of things. It should to in utilities. Aaron Meurer On May 21, 2011, at 2:11 PM, Ondrej Certik wrote: On Sat, May 21, 2011 at 12:27 PM, Vinzent Steinberg

Re: [sympy] Reorganise the package structure

On May 20, 2011, at 8:44 PM, Ronan Lamy wrote: I think it would be good to tidy up our package structure before the release, because we won't get another opportunity to do so for quite a while. Here's a list of things to consider in no particular order, bearing in mind that compatibility with

Re: [sympy] Re: Symbolic Combinatorics: Permutations

I agree. Like I said, unless you want to create very abstract objects that represent permutations with symbolic n, which would be implemented completely differently from the explicit permutations, then don't worry about symbolic support for this one. The main thing for the issue of making

Re: [sympy] Re: Symbolic Combinatorics: Permutations

So I guess it might be less useful to do this with permutation per se than for some of the other things in Saptarshi's GSoC project. The example I gave in the comment to his proposal was that he should do things like class Totient(Expr): def __init__ ... instead of def totient(n):

Re: [sympy] Sympy on Android (SL4A with Python)

I don't own an Android, but can you not somehow cd into the sympy directory and run ./setup.py install? Aaron Meurer On May 8, 2011, at 5:11 AM, Roberto Colistete Jr. wrote: Hi, It is my first participation here : how can I install Sympy on Android (using SL4A with Python) ? I tried

Re: [sympy] Re: Assumptions

On May 5, 2011, at 1:00 PM, Haz wrote: On Thu, May 5, 2011 at 12:29 PM, Aaron Meurer asmeu...@gmail.com wrote: The big questions that remain are those involving (1): it is generally accepted that the old assumption system should give way to the new one, but to what extent we remove

Re: [sympy] Assumptions

On May 6, 2011, at 10:32 AM, Ronan Lamy wrote: Le jeudi 05 mai 2011 à 20:18 +0100, Tom Bachmann a écrit : First of all thanks alexey, for steering the discussion into an important direction! On 05.05.2011 19:42, Alexey U. Gudchenko wrote: Well, when I have concerned the assumptions, I

Re: [sympy] Re: Assumptions

On May 6, 2011, at 6:09 PM, Alexey U. Gudchenko wrote: 02.05.2011 20:25, Ronan Lamy пишет: Le dimanche 01 mai 2011 à 23:37 -0700, Ondrej Certik a écrit : You should assume it. Non commutative symbols are just making things very complicated, and it was a mistake to add them into the core

Re: [sympy] Re: Assumptions

On May 3, 2011, at 6:30 PM, Ondrej Certik wrote: On Tue, May 3, 2011 at 2:02 PM, Tom Bachmann e_mc...@web.de wrote: On 03.05.2011 21:47, Ondrej Certik wrote: On Tue, May 3, 2011 at 8:44 AM, Fredrik Johansson fredrik.johans...@gmail.com wrote: On Tue, May 3, 2011 at 3:00 PM, Tom

Re: [sympy] Re: Assumptions

On May 4, 2011, at 2:06 PM, Ronan Lamy wrote: Le mercredi 04 mai 2011 à 20:09 +0200, Fredrik Johansson a écrit : On Tue, May 3, 2011 at 11:24 PM, Ronan Lamy ronan.l...@gmail.com wrote: Le mardi 03 mai 2011 à 22:02 +0100, Tom Bachmann a écrit : On 03.05.2011 21:47, Ondrej Certik wrote: On

Re: [sympy] Re: Assumptions

On May 4, 2011, at 4:52 PM, Tom Bachmann wrote: Singleton objects are useful for more important things than optimising '==' with 'is'. They represent 'sui generis' objects that have specific behaviour. But that wasn't my point (not that you could have known it, given that I forgot half the

Re: [sympy] Re: Assumptions

I agree that Frederik's idea is an interesting one, but we would need to have other people who understand it well if we were to attempt to implement it. If you could write something up on the wiki, it would go a long way towards this. Aaron Meurer On May 2, 2011, at 11:49 AM, Haz wrote: A

[sympy] SymPy's mission

So there has been some discussion recently, both on and off list, as to what SymPy is and what it should be. That is why I think that we need to have a mission statement, which clearly outlines what SymPy is and where it should go. Fortunately, I think we have really had one all along. I

Re: [sympy] Re: SymPy Bot

On May 1, 2011, at 12:44 PM, Ondrej Certik wrote: On Sun, May 1, 2011 at 10:30 AM, Aaron S. Meurer asmeu...@gmail.com wrote: On Apr 30, 2011, at 11:13 PM, Ondrej Certik wrote: On Sat, Apr 30, 2011 at 4:10 PM, Vinzent Steinberg vinzent.steinb...@googlemail.com wrote: On Apr 30, 11:59 pm

Re: [sympy] Re: Assumptions

On May 1, 2011, at 1:35 PM, Tom Bachmann wrote: On 1 Mai, 16:40, Haz christian.mu...@gmail.com wrote: The cache issue runs deeper -- variable x, that depends on variably y, may simplify to something that doesn't even involve y because of the assumptions that come with y. In this case, a

Re: [sympy] Re: Assumptions

On May 1, 2011, at 2:40 PM, Haz wrote: This is the chunk that things get done in: - https://github.com/sympy/sympy/blob/master/sympy/core/cache.py#L75 Have a global variable called working, and a local variable called first. Put this at the top of wrapper: first = False if not

[sympy] Better management between GitHub and Google Code

Does anyone have any ideas on ways that we can better manage the pull requests at GitHub and the issues at Google Code? Right now there are some issues: - People forget to reference the issue number on the pull request or the pull request on the issue. The best case is that I notice this and

Re: [sympy] Re: what should limit(x - oo, x, oo) give?

On Apr 29, 2011, at 12:17 PM, Ronan Lamy wrote: Le vendredi 29 avril 2011 à 09:50 -0700, Tom Bachmann a écrit : snip I don't really think it's worth the hassle fixing this as long as we can only do trivial cases anyway. I think limit() needs to get smarter, not gruntz(). It should be able

Re: [sympy] Re: self-identifying xfails

The tests are supposed to print the names of the functions after the colons in xpassed tests _ sympy/solvers/tests/test_ode.py: sympy/solvers/tests/test_ode.py: sympy/solvers/tests/test_ode.py: But it is broken somehow. Anyway,

Re: [sympy] Re: self-identifying xfails

, 2011, at 12:58 PM, Aaron S. Meurer wrote: It works in Python 2.6. Something in Python 2.7 broke it: xpassed tests _ sympy/simplify/tests/test_sqrtdenest.py:'XPASS: test_sqrtdenest2' Aaron Meurer On Apr 29, 2011, at 12:52

Re: [sympy] TableForm

So I agree with Brian here. TableForm is just another printer, which clearly belongs in SymPy. Aaron Meurer On Apr 29, 2011, at 12:56 PM, Ondrej Certik wrote: On Fri, Apr 29, 2011 at 11:24 AM, Brian Granger elliso...@gmail.com wrote: In my mind the different mathematica *Form functions are

Re: [sympy] Better management between GitHub and Google Code

On Apr 29, 2011, at 1:08 PM, Haz wrote: What were the road-blocks from moving the issues to github again? On Fri, Apr 29, 2011 at 2:38 PM, Aaron S. Meurer asmeu...@gmail.com wrote: Does anyone have any ideas on ways that we can better manage the pull requests at GitHub and the issues

Re: [sympy] Re: TableForm

On Apr 29, 2011, at 4:01 PM, Vinzent Steinberg wrote: On Apr 29, 10:59 pm, Ronan Lamy ronan.l...@gmail.com wrote: Le vendredi 29 avril 2011 à 11:56 -0700, Ondrej Certik a écrit : On Fri, Apr 29, 2011 at 11:24 AM, Brian Granger elliso...@gmail.com wrote: In my mind the different mathematica

[sympy] Assumptions

So Ondřej, Christian, and I talked about this before GSoC, but I forgot to mention it on the list. We need to figure out, as a community, how to remove the old assumptions system and merge in the new one. We have already had several branches attempting to do it, and we couldn't even get a

Re: [sympy] Re: Better management between GitHub and Google Code

most of that, no? On Fri, Apr 29, 2011 at 6:42 PM, Aaron S. Meurer asmeu...@gmail.com wrote: Technically, Google Code has a better tag system, because it lets you have tags like our Priority, Status, and Type that can only take one value per issue. Also, the default labels functionality

Re: [sympy] SymPy Bot

I hope pastebin doesn't mind so many posts. And what about using gist? Also, you should consider making use tox. Aaron Meurer On Apr 28, 2011, at 4:20 AM, Ondrej Certik wrote: Hi, I have spent 4 hours and created a SymPy Bot: https://github.com/sympy/sympy-bot I have reused Tom's

Re: [sympy] can tests involing warnings be put in doctests rather than the test suite?

I already thought of much of this a while back. See http://code.google.com/p/sympy/issues/detail?id=2142. We should consider creating our own SymPyDeprecationWarning, since in Python 2.5+ DeprecationWarnings are not shown by default, but I think we ought to enable them at least in isympy.

Re: [sympy] can tests involing warnings be put in doctests rather than the test suite?

I only mean that they should be turned into exceptions for the tests. Of course, otherwise they should stay as warnings. Aaron Meurer On Apr 27, 2011, at 1:08 PM, Alexey U. Gudchenko wrote: 27.04.2011 22:22, Aaron S. Meurer пишет: I already thought of much of this a while back. See http

Re: [sympy] On a sympy-next tree

On Apr 27, 2011, at 1:31 AM, Mateusz Paprocki wrote: Hi, On 27 April 2011 09:20, Ondrej Certik ond...@certik.cz wrote: On Tue, Apr 26, 2011 at 8:39 PM, Aaron S. Meurer asmeu...@gmail.com wrote: On Apr 26, 2011, at 7:08 PM, Ondrej Certik wrote: On Tue, Apr 26, 2011 at 5:18 PM, Haz

Re: [sympy] On a sympy-next tree

On Apr 26, 2011, at 7:08 PM, Ondrej Certik wrote: On Tue, Apr 26, 2011 at 5:18 PM, Haz christian.mu...@gmail.com wrote: Couldn't some VM's do the trick? On Tue, Apr 26, 2011 at 8:05 PM, Mateusz Paprocki matt...@gmail.com wrote: Hi, On 26 April 2011 16:59, Ondrej Certik ond...@certik.cz

Re: [sympy] Merging the gruntz fixes

On Apr 25, 2011, at 1:54 PM, Tom Bachmann wrote: Dear list, I would like to open a discussion on how to merge my (fairly extensive) fixes to the gruntz algorithm. As far as I understand release is currently top priority, so merging a large change might seem a no-go (and I shall not assume

Re: [sympy] Merging the gruntz fixes

On Apr 25, 2011, at 5:12 PM, Ondrej Certik wrote: On Mon, Apr 25, 2011 at 12:59 PM, Aaron S. Meurer asmeu...@gmail.com wrote: On Apr 25, 2011, at 1:54 PM, Tom Bachmann wrote: Dear list, I would like to open a discussion on how to merge my (fairly extensive) fixes to the gruntz

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