Is it necessary to have a pull request before 6, i am working on a patch
but i have not completed it yet, so i will commit my patch only when i
complete it, so is it necessary to have a pull request before 6 or we have
time before 20 april.
Best,
Arpit
On Sat, Mar 31, 2012 at 5:43 PM, arpit
As Aaron explained elsewhere, the PR has to be submitted by the 6th.
On 03.04.2012 10:54, arpit goyal wrote:
Is it necessary to have a pull request before 6, i am working on a patch
but i have not completed it yet, so i will commit my patch only when i
complete it, so is it necessary to have a
Yes, sorry, but we need to have time to review the patch, so it can be
merged before the patch deadline. Furthermore, the patch plays a
significant role in the review process, so we need this information
when reviewing applications.
Aaron Meurer
On Tue, Apr 3, 2012 at 3:55 AM, Tom Bachmann
Will try my best to complete it before the deadline.
Thanks
Arpit Goyal
On Tue, Apr 3, 2012 at 9:51 PM, Aaron Meurer asmeu...@gmail.com wrote:
Yes, sorry, but we need to have time to review the patch, so it can be
merged before the patch deadline. Furthermore, the patch plays a
significant
On 30.03.2012 16:27, arpit goyal wrote:
- check convergence
How do you want to do that? What information about the function do
you need for this? How is it obtained and stored?
Fort this i have thought to check for different type of integrands
possible:
1)f(x)= p(x)/q(x) , check
Thanks tom for the review , please let me know if any thing else i should
change in my proposal to make it more explanatory and meaningful.
Regards
Arpit Goyal
On Sat, Mar 31, 2012 at 3:25 PM, Tom Bachmann e_mc...@web.de wrote:
On 30.03.2012 16:27, arpit goyal wrote:
- check convergence
Which one is your proposa?
https://github.com/sympy/sympy/wiki/Arpit-Goyal-:-Definite-integration-using-residue
or
https://github.com/sympy/sympy/wiki/Arpit-Goyal-:Definite-integrals-Using-Residue
?
On 31.03.2012 10:58, arpit goyal wrote:
Thanks tom for the review , please let me know if
https://github.com/sympy/sympy/wiki/Arpit-Goyal-:-Definite-integration-using-residue
i don't know why there are two urls , but they both are my proposal and
identical one. I have updated above one so please follow the above one only.
On Sat, Mar 31, 2012 at 3:36 PM, Tom Bachmann e_mc...@web.de
I have included an example which i tried manually (it can be done manually)
, and then i have listed the steps taken and will be used to frame the
algorithms .
Please have a look and tell me if have to be more explanatory on this one.
On Sat, Mar 31, 2012 at 3:44 PM, arpit goyal
Hi,
I'm not quite sure about your convergence comment in the example (we
integrate over a compact contour ... we only need the integrands to be
continuous on it?).
Aside that, this proposal looks very promising (I think). I would advise
you to upload it to melange (note that it can still be
Ohh sorry , i was just following the steps , i just realised that we need
not have to have condition for convegence if integrating on a contour.
Thanks for pointing the mistake , i would have not considered it .
Arpit
On Sat, Mar 31, 2012 at 5:35 PM, Tom Bachmann e_mc...@web.de wrote:
Hi,
https://github.com/sympy/sympy/wiki/Arpit-Goyal-:-Definite-integration-using-residue
I have added my application ,please review it and suggest me what changes
should be done.
On Thu, Mar 29, 2012 at 7:33 PM, Tom Bachmann e_mc...@web.de wrote:
I think it is definitely worth pursuing (and this
Hi,
I think this is a good start. What lacks, however, is details on how
your code is actually supposed to *work*. For example:
- extending solve
Have you looked at the code? Do you know how it finds solutions and if
the extensions you have in mind are easy/difficult?
- fixing residue
Same
On Fri, Mar 30, 2012 at 7:08 PM, Tom Bachmann e_mc...@web.de wrote:
Hi,
I think this is a good start. What lacks, however, is details on how your
code is actually supposed to *work*. For example:
- extending solve
Have you looked at the code? Do you know how it finds solutions and if the
Just a minor point, but in SymPy infinity is spelled oo (oh oh), not
00 (zero zero).
Aaron Meurer
On Fri, Mar 30, 2012 at 7:12 AM, arpit goyal agmp...@gmail.com wrote:
https://github.com/sympy/sympy/wiki/Arpit-Goyal-:-Definite-integration-using-residue
I have added my application ,please
My typing mistake ,sorry for that.
On Sat, Mar 31, 2012 at 12:09 AM, Aaron Meurer asmeu...@gmail.com wrote:
Just a minor point, but in SymPy infinity is spelled oo (oh oh), not
00 (zero zero).
Aaron Meurer
On Fri, Mar 30, 2012 at 7:12 AM, arpit goyal agmp...@gmail.com wrote:
Well , now as i have all the constraints and milestones to work on for the
project ,so please suggest me if it is a worth idea for GSOC ?
I will be submitting my proposal soon.
On Thu, Mar 29, 2012 at 12:29 AM, Aaron Meurer asmeu...@gmail.com wrote:
On Wed, Mar 28, 2012 at 6:12 AM, Tom Bachmann
I think it is definitely worth pursuing (and this should presumably be
assumed of anything on the ideas list), but much depends on the
specifics of your proposal.
On 29.03.2012 13:41, arpit goyal wrote:
Well , now as i have all the constraints and milestones to work on for
the project ,so
Note also that, for computing with residues, you don't need a precise
list of the poles, just a *superset*. Just as you don't need precise
knowledge of the growth of the function, just an upper bound (although
here you probably want to be tighter). So it might be best to look at
all parts of
Tom,
Sorry but I don't understand your point. As we do require precise list of
poles (i might be wrong ,it is just what i know), as we reqire summatin of
all the residues at the poles , so if any one is left ,it will change the
answer.
On Wed, Mar 28, 2012 at 5:42 PM, Tom Bachmann
Sorry my bad , i misread , you mention *superset* . so no ples will be left
out .
On Wed, Mar 28, 2012 at 6:10 PM, arpit goyal agmp...@gmail.com wrote:
Tom,
Sorry but I don't understand your point. As we do require precise list of
poles (i might be wrong ,it is just what i know), as we reqire
Now this means Definite Integration using residues has to cross these
hurdles :
1)Modify solve() for periodic functions ,it works very well for polynomial.
2)Modify residue() function
3) Convergence of the integrand .
4)Categorise the Integrand
On Wed, Mar 28, 2012 at 6:14 PM, arpit goyal
Also, given a concrete integral, transform it into one in the complex
plane. This requires appropriate choice and representation of contour.
Figure out which (potential) poles lie inside the contour.
On 28.03.2012 14:49, arpit goyal wrote:
Now this means Definite Integration using residues
Yes , that indeed is the important part .Choice of poles will be dependent
on in which category our integrand come .
For ex. integral (1/(1+x**3) ,we just have to consider one pole and take
the contour 2pi/3 part of the circle of radius R .(0 angle2pi/3).
On Wed, Mar 28, 2012 at 7:34 PM, Tom
On Wed, Mar 28, 2012 at 6:12 AM, Tom Bachmann e_mc...@web.de wrote:
Note also that, for computing with residues, you don't need a precise list
of the poles, just a *superset*.
This reminds me of another point. Aside from symbolic parameters
changing the contour needed for convergence, it can
This means i have to first of all , modify the solve() and residue()
function then work on finding the definite integral.
I have done a course on Numerical Methods and Computation and do studied
about finding roots of a function .
But i did not find them very much efficient.
Please can any one
Numerically calculating the roots is not very useful. If we wanted to
use numerics, we would just compute the integral numerically in the
first place. I suppose a numeric root counting algorithm could be
useful for verifying that you have all the roots.
You should focus of classes of functions
Can you tell me what algorithms are used to find the roots. I will try
digging more about it and see if the problem can be resolved.
On Tue, Mar 27, 2012 at 9:36 PM, Aaron Meurer asmeu...@gmail.com wrote:
Numerically calculating the roots is not very useful. If we wanted to
use numerics, we
Take a look at sympy/solvers/solvers.py.
Aaron Meurer
On Tue, Mar 27, 2012 at 11:22 AM, arpit goyal agmp...@gmail.com wrote:
Can you tell me what algorithms are used to find the roots. I will try
digging more about it and see if the problem can be resolved.
On Tue, Mar 27, 2012 at 9:36 PM,
Convergence of the integrand can be tested for the five cases I stated
previously like
If are integration is of type F(x)/Q(x) then if Deg(Q(x))-Deg(Q(x))=2 then
it is good to integrate using residues.
Similiary for trignometric function we can check after substituting the
trignometric function
While looking sympy tracker i come across issue
3179http://code.google.com/p/sympy/issues/detail?id=3179 which
is integrate(1/(cos(x)+2),(x,0,2*pi)) ans gives zero but answer must be
2*pi/3
and this is a direct application of residues , trignometric functions
category.
on the other bolcked on
On Mon, Mar 26, 2012 at 2:54 AM, arpit goyal agmp...@gmail.com wrote:
Convergence of the integrand can be tested for the five cases I stated
previously like
If are integration is of type F(x)/Q(x) then if Deg(Q(x))-Deg(Q(x))=2 then
it is good to integrate using residues.
Similiary for
I would try Meijer G first because the result is generally going to be
better. For example, it will just give you the convergence conditions
(they might not be tight, but in my experience they usually are).
Also, as Tom noted, residue() is very buggy, in the sense that it
often gives just plain
I am a second year undergraduate ,doing my major in Mathematics and
functions.
I have done a course in Complex analysis and conider myself good at it.
I am interested in the idea of definite integral using residues ,and i
have come up with the structure of which function can be integrated using
Sounds like you have looked into the code and have an overall strategy,
which is a very good start.
The Meijer G-function integration may work in cases where residues
don't. Do you have a plan how to detect such cases?
(I'm much more a programming expert than a math expert, so others may
Yes ,you are right , Meijer G-functions has it's own importance .
Integration using Residues as stated in previous mail is applicable in
finding those Integrals who fall in the five category stated above.
What i plan is to categorize function by their category in which they fall
, Like if the
I think the best way would be to just try the Meijer G code first, and
only fall back to residues if that fails.
Another thing to consider is that if an integral has symbolic
coefficients, the choice of contour may depend on the value of the
paramater. For example, for Fourier-type integrals
Am 26.03.2012 03:26, schrieb Aaron Meurer:
I think the best way would be to just try the Meijer G code first, and
only fall back to residues if that fails.
How quickly can the residues code find out whether it will work on a
given integral?
If that is quick, trying residues first would be
Many kinds of (real) definite integrals can be found using the
results for contour integrals in the complex plane. As values of contour
integrals can usually be written down with very little difficulty. We
simply have to locate the poles inside the contour, find the residues at
these poles, and
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