I am seeing what remains to be done. Chetna's pull request PR #2380
<https://github.com/sympy/sympy/pull/2380/files> is an implementation of
Coupled Differential System(+ other things), which is present as Chapter
8 in the Symbolic Integration (Manuel Bronstein). In total there are 9
chapters, and looking at chapter 9 doesn't contain much of the pseudo
code or is it just a theoretical chapter for aide? I don't know if the
all the chapters from book (Manuel Bronstein) were implemented in order
without skipping any.
On Monday 13 March 2017 10:35 PM, Aaron Meurer wrote:
I think you'll need to look at the merged pull requests to see what
was done.
Aaron Meurer
On Mon, Mar 13, 2017 at 10:01 AM Gaurav Dhingra
<[email protected] <mailto:[email protected]>>
wrote:
There does *not* seem to be any report of the project of Chetna,
https://github.com/sympy/sympy/wiki/GSoC-2013-Report, or may be I
couldn't find it anywhere. In any case I have started writing the
proposal for /completing the Transcendental part integration/,
since I very much like the impact of the project.
On Monday 13 March 2017 03:49 AM, Aaron Meurer wrote:
Potentially. I would need to take a closer look at how much remains to
be done for the trigonometric case.
Aaron Meurer
On Sun, Mar 12, 2017 at 10:55 AM, Gaurav Dhingra
<[email protected]> <mailto:[email protected]> wrote:
Hi Aaron,
Considering my mathematical background and knowledge and after consulting
Kalevi, I have doubt over my ability to work on Symbolic Integration
(especially for algebraic part integration). But considering the amount work
that remains to be done in the transcendental part integration + Completing
the un-merged pull requests (by Kalevi and Chetna) do you think that would
be enough for a GSoC project? Since I don't want to get into the Algebraic
part integration.
Thanks
On Thursday, March 2, 2017 at 10:59:47 PM UTC+5:30, Aaron Meurer wrote:
The main reference is Bronstein's book, "Symbolic Integration I:
Transcendental Functions". Most of what is in that book has already
been implemented, but the trigonometric case has not. Bronstein's
paper "Symbolic Integration Tutorial" (which can be found here
https://www-sop.inria.fr/cafe/Manuel.Bronstein/publications/mb_papers.html)
gives a high level overview of the whole algorithm, including the
algebraic and mixed cases (his book only deals with the transcendental
case). Unfortunately, the "easiest" bits from the book have already
been implemented, and what remains are algorithms that don't have
pseudocode. The algebraic case will require more references than
Bronstein's book.
As for the work since Chetna, other than the still open PRs
https://github.com/sympy/sympy/pulls/cheatiiit, the only work I am
aware of is this pull request by jksuom
https://github.com/sympy/sympy/pull/11761.
Aaron Meurer
On Thu, Mar 2, 2017 at 12:17 PM, Gaurav Dhingra
<[email protected]> <mailto:[email protected]> wrote:
Also I see a list of references for it here
https://github.com/sympy/sympy/wiki/Technical-References#symbolic-integration
, which among these would be good to start first? (brief idea would
suffice)
Gaurav Dhingra
On Thursday 02 March 2017 12:17 AM, Aaron Meurer wrote:
Other algorithms that would be useful, if you believe you are capable of
implementing them:
- cylindrical algebraic decomposition (CAD)
- the Risch algorithm.
There are references on the ideas page. Both are challenging from a
mathematical point of view (though I believe less so than Karr).
Aaron Meurer
On Wed, Mar 1, 2017 at 9:59 AM Ondřej Čertík<[email protected]>
<mailto:[email protected]>
wrote:
On Wed, Mar 1, 2017 at 4:40 AM, Gaurav Dhingra
<[email protected]> <mailto:[email protected]> wrote:
I've been thinking about applying again, though I am not sure what
the
project should be. Are there any good algorithms that are not
implemented
that could make a good project (I've read the ideas page)? I have 3
projects
in mind:
(a). Implementation of Karr's algorithm, I believe no one has done
much
work
except Matthew Rocklin who did work on Concrete module.
(b). Complex Analysis: I quote the statement by Kalevi:
What I think should be added to SymPy is the Laurent series
expansion
of
meromorphic functions.
The trouble with the current implementation of limit is that it
often
goes
too early to gruntz.
That should only be used for functions that are not meromorphic but
have
an essential singularity.
Also he opened a few issues on SymPy which might also use Complex
Analysis.
Plus, since I have a course on Complex Analysis, which include topics
.
But
I am not sure even if it is possible to implement these things in a
Computer
Algebra System.
(c). Last summer Sumith mentioned about A dedicated bug fixing
project
in
GSoC . Since I feel like I can try to handle quite a few issues of
multiple
modules, I would want to apply for this one if the above two doesn't
have a
mentor alloted to them.
I might not want to mentor a project, since that seems like too much
pressure for me. Applying as a student would be my priority.
Here is a really cool project that I would love to see happen:
https://github.com/sympy/sympy/issues/12233
Ondrej
Gaurav Dhingra
On Monday 27 February 2017 11:05 PM, Aaron Meurer wrote:
SymPy was accepted as a GSoC org again this year.
Interested students, please read our instructions on how to apply
here
https://github.com/sympy/sympy/wiki/GSoC-2017-Student-Instructions.
The most important things are to pick an idea from our ideas list to
discuss with us, and to start working on a patch to fulfill your
patch
requirement.
Mentors, I will be sending you invites on Google's website. If you
never signed up on the ideas page, please let me know so I can invite
you.
Aaron Meurer
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