Comment #2 on issue 4019 by smi...@gmail.com: divisors could use a 'pairs'
flag
http://code.google.com/p/sympy/issues/detail?id=4019
(modulo the conditional to take the middle element when the list has an odd
length)
Rather than another flag, should this just be called `divisor_pairs`?
Updates:
Status: Fixed
Comment #4 on issue 4016 by smi...@gmail.com: Parser fails to parse pi with
implicit_multiplication
http://code.google.com/p/sympy/issues/detail?id=4016
(No comment was entered for this change.)
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Status: New
Owner:
Labels: Type-Defect Priority-Medium
New issue 4021 by lep@gmail.com: latex printing of Derivative
http://code.google.com/p/sympy/issues/detail?id=4021
t = Symbol('t')
r = Function('r')(t)
print latex(Derivative(r,t,3))
Out :
\frac{\partial^{3}}{\partial^{3} t}
Comment #1 on issue 4021 by asmeu...@gmail.com: latex printing of Derivative
http://code.google.com/p/sympy/issues/detail?id=4021
I think this has been fixed.
In [9]: latex(Derivative(r,t,3))
Out[9]: '\\frac{d^{3}}{d t^{3}} r{\\left (t \\right )}'
In [10]: r = Function('r')(t, x)
In [11]:
Status: Valid
Owner:
Labels: Type-Defect Priority-Medium Simplify
New issue 4022 by asmeu...@gmail.com: powdenest won't denest a power
http://code.google.com/p/sympy/issues/detail?id=4022
In [5]: powdenest(S(-8*2**(2/3)/(3*nu**(1/3)*(y_i - 1)**(22/3)*((y_i -
1)**(-8/3))**(7/4))),
Comment #2 on issue 4020 by versusv...@gmail.com: Wrong integral for tanh
http://code.google.com/p/sympy/issues/detail?id=4020
Look here:
http://www.sympygamma.com/input/?i=tanh%28x%29.integrate%28x%29
Yeah, diff and simplify gives me tanh too, but tanh always less then one,
which means that
@Mario: Thank you very much for the reply. I will have to go for this
option If I am unable to
fix `match()`
@Aaron: Sure.
Regards,
Thilina
On Mon, Sep 16, 2013 at 3:43 AM, Aaron Meurer asmeu...@gmail.com wrote:
It's annoying to do this all the time, though. With dsolve and
classify_ode, I
Hello SymPy users,
Is there a way to make SymPy cancel common expression? For example:
from sympy import *var(a b)b = 1/(sqrt(a) - 1)**(S(8)/3)b.diff(a) / (2 *
sqrt(2) * b**(S(3)/4)) # gives: -sqrt(2)/(3*sqrt(a)*(sqrt(a) -
1)**(11/3)*((sqrt(a) - 1)**(-8/3))**(3/4))
I want SymPy to cancel
Further considerations:
- soon there will be a PR to add auto-matrix indices capabilities. In
the construction of a tensor, indices marked by True instead of an index
symbol will be considered auto-matrix indices, they behave upon
multiplication with other tensors as matrices or
Dear all,
(Sorry in case this is a double post, it seems to have vanished as far as I
can tell.)
I have a large number of boolean expressions (a few thousand) that each
only depend on a few symbols, but in total there are thousands of symbols
as well, and I know the truth values of each
Dear all,
My question basically has two parts:
1.) I have a number of (a few thousand) logical expressions each consisting
of a handful of symbols (in total there are several thousand symbols as
well). Currently, I generate a dictionary (let's call it 'big_dict') with
the symbols and their
Concerning MadGraph5, it's written in Python (with exceptions), it's
license is the UoI-NCSA open source license:
http://www.opensource.org/licenses/UoI-NCSA.php
http://en.wikipedia.org/wiki/University_of_Illinois/NCSA_Open_Source_License
It is similar to the New BSD (as used in SymPy), but
The site just says: The mathematical knowledge on this website is
freely available for any educational, academic or commercial use.
Please include the website address and appropriately acknowledge its
author in any product incorporating its contents. So I guess that
means we can reuse it.
But I
On Mon, Sep 16, 2013 at 5:56 AM, Moritz Beber moritz.be...@gmail.com wrote:
Dear all,
My question basically has two parts:
1.) I have a number of (a few thousand) logical expressions each consisting
of a handful of symbols (in total there are several thousand symbols as
well). Currently, I
It looks like that license is exactly the 3-clause BSD license, except
the opening clause reads like the MIT license instead of the BSD
license. So it should be completely fine to reuse the source code
however you want.
Aaron Meurer
On Mon, Sep 16, 2013 at 11:32 AM, F. B. franz.bona...@gmail.com
But no claim is raised that the test suites cover the whole range of
interesting problems! In fact they developed around the discussion of
Albert Rich's Rubi (RUle-Based Integration). It is worth to look this up:
http://www.apmaths.uwo.ca/~arich/
Wow, that code is amazingly simple!
I am implementing Wester test cases as part of Issue 694.
Can somebody explain me what is P9 problem (attached)?
I think is the Frobenius norm but what are a,b,c? Elements of A?
Thanks,
Pablo
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To
Lie groups are the reason why it is better to represent gamma matrices as
(Lorentz, Spinor, Spinor), the (Lorentz)-matrix representation loses the
spinor-type transformation properties.
Why? the spinor transformations appear in matrix form
S G(m) S**-1 = L(m, -n) G(n)
On Monday, September
The generation of diagrams is indeed written in python and the
algorithm is fairly simple and easy to implement (I even have an
implementation in my repo). You can see the algorithm here
http://arxiv.org/abs/1106.0522 (and in a few other links already
posted on this mail thread).
However this
It would be nice to have function overloading in Python... what about some
kind of decorator to __new__ to filter the default args construction (and
avoid calling all of __new__ functionalities)?
An inspiration might be:
http://www.artima.com/weblogs/viewpost.jsp?thread=101605
On Monday,
On Mon, Sep 16, 2013 at 12:05 PM, Aaron Meurer asmeu...@gmail.com wrote:
It looks like that license is exactly the 3-clause BSD license, except
the opening clause reads like the MIT license instead of the BSD
license. So it should be completely fine to reuse the source code
however you want.
On Monday, September 16, 2013 8:46:10 PM UTC+2, Ondřej Čertík wrote:
We should however still copy their license into our LICENSE file (or
somewhere),
to comply with it.
Well, open source philosophy is to share the code, but almost all open
source project require citing whose original
What about asking people at Mathics some help to import these rule-based
integration scripts?
Mathics is a project to create an interpreter similar to Wolfram
Mathematica, with algorithmic fallback on SymPy and/or Sage. I think they
are experienced in translating Mathematica code to SymPy.
--
The issue is that you have a nested power. x**a**b != x**(a*b) in
general (see http://docs.sympy.org/latest/tutorial/simplification.html#powers),
so SymPy doesn't simplify this automatically.
The solution should be to use powdenest, but it seems that
powdenest(force=True) is not working for me.
This is the exact same kind of expression as at
https://groups.google.com/forum/#!topic/sympy/ibBh-i6DevE.
Aaron Meurer
On Mon, Sep 16, 2013 at 6:25 AM, Boris Kheyfets kheyfbo...@gmail.com wrote:
Hello SymPy users,
Is there a way to make SymPy cancel common expression? For example:
from
I think the people at Mathics is just Angus, but sure, feel free to
ask him if he wants to help out :)
Aaron Meurer
On Mon, Sep 16, 2013 at 4:42 PM, F. B. franz.bona...@gmail.com wrote:
What about asking people at Mathics some help to import these rule-based
integration scripts?
Mathics is a
On Mon, Sep 16, 2013 at 4:39 PM, F. B. franz.bona...@gmail.com wrote:
On Monday, September 16, 2013 8:46:10 PM UTC+2, Ondřej Čertík wrote:
We should however still copy their license into our LICENSE file (or
somewhere),
to comply with it.
Well, open source philosophy is to share the
You should go to Wester's website (I think there is a link on the
issue) and download the files he used to test the various computer
algebra systems. Many of the entries in the paper itself are abridged,
so you have to look at the actual test files to see what input he
actually meant.
Aaron
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