It's hard to say how much time each of these would take. The roadmap aims to completely replace all of the existing code for systems of ODEs. How much of that you think you would be able to do is up to you if making a proposal.
None of the other things described in the roadmap is implemented anywhere as far as I know. Following the roadmap it should be possible to close all of these issues I think: https://github.com/sympy/sympy/issues?q=is%3Aopen+is%3Aissue+label%3Asolvers.dsolve.system On Fri, 13 Mar 2020 at 22:30, Milan Jolly <[email protected]> wrote: > > I have mostly read and understood matrix exponentials and Jordan forms along > with the ODE systems roadmap. But I am unclear as to what has already been > done when it comes to implementing the general solvers. For example: The > matrix exponentials part has already been implemented and now I have a PR > that has revived the matrix exponential code. > > I want to make a proposal and contribute to make these general solvers during > this summer if my proposal gets accepted. But I am unclear what should be the > parts I need to work during community bonding period, phase 1, phase 2 and > phase 3 as I am unaware how much time each part of the general solvers would > take. > > If someone can help me in this regard(helping me with these 2 questions) then > it would be great. > > > On Tue, Feb 25, 2020, 5:09 AM Milan Jolly <[email protected]> wrote: >> >> I will go through the roadmap. Also, I will work on reviving and finishing >> the stalled PRs namely the matrix exponential one for now as I am interested >> in working towards this. Thanks. >> >> On Mon, Feb 24, 2020, 9:56 PM Oscar Benjamin <[email protected]> >> wrote: >>> >>> This section in the roadmap refers to existing stalled PRs trying to >>> fix the n-equations solver for constant coefficient homogeneous ODEs >>> which is the first step: >>> https://github.com/sympy/sympy/wiki/ODE-Systems-roadmap#constant-coefficients---current-status >>> >>> A first step would be to attempt to revive one or both of those PRs >>> and finish them off. >>> >>> On Mon, 24 Feb 2020 at 05:59, Milan Jolly <[email protected]> wrote: >>> > >>> > So, I am interested in rewriting parts of the current ODE as discussed in >>> > the roadmap. Is there any work started in that direction and if not then >>> > can I create a PR for the same? >>> > >>> > On Mon, Feb 24, 2020, 2:52 AM Oscar Benjamin <[email protected]> >>> > wrote: >>> >> >>> >> The current refactoring effort applies only to the case of solving >>> >> *single* ODEs. The ODE systems code also needs to be refactored but >>> >> (in my opinion) needs a complete rewrite. That is what the roadmap is >>> >> about (it describes how to rewrite everything). The code for systems >>> >> of ODEs should also get refactored in the process but there is no need >>> >> to "refactor" it in its current form if it is in fact being >>> >> *completely* rewritten: we can just make sure that the new code is >>> >> written the way we want it to be. >>> >> >>> >> On Sun, 23 Feb 2020 at 19:52, Milan Jolly <[email protected]> >>> >> wrote: >>> >> > >>> >> > Ok so I have gone through the links suggested and I have realised that >>> >> > as far as ODE module is concerned, refactoring is the most important >>> >> > task. But, as far as that is concerned, I think Mohit Balwani is >>> >> > working on this for a while and I want to limit any collisions with my >>> >> > co-contributors. So, I have couple of ideas to work on: >>> >> > 1. Helping to extend the solvers, i.e.implementing a fully working >>> >> > n-equations solver for constant coefficient homogeneous systems. This >>> >> > is from the ODE systems map. I am interested in working on this but I >>> >> > understand that it might be hard to work upon it while refactoring >>> >> > takes place. Still, if its possible to work on this and if no one else >>> >> > has started to work in this direction yet then I am willing to work >>> >> > for this. >>> >> > 2. Using connected components function implemented by Oscar Benjamin >>> >> > in https://github.com/sympy/sympy/pull/16225 to enhance ODE solvers >>> >> > and computing eigen values faster as mentioned here >>> >> > https://github.com/sympy/sympy/issues/16207 . >>> >> > 3. This idea is not mentioned in the ideas page and is something of my >>> >> > own. If there is anything possible, then I can also work on extending >>> >> > functions like maximum, minimum, argmax, argmin, etc in calculus >>> >> > module. I have been working on the issue >>> >> > https://github.com/sympy/sympy/pull/18550 and I think there is some >>> >> > scope to extend these functionalities. >>> >> > >>> >> > On Sunday, February 23, 2020 at 1:32:20 AM UTC+5:30, Milan Jolly wrote: >>> >> >> >>> >> >> Hello everyone, >>> >> >> >>> >> >> My name is Milan Jolly and I am an undergraduate student at Indian >>> >> >> Institute of Technology, Patna. For the past 2 month, I have been >>> >> >> learning and exploring sympy through either contributions, reading >>> >> >> documentation or trying examples out. This last month I have learned >>> >> >> a lot of new things thanks to the well designed code-base, the >>> >> >> structured way this community works and most importantly the >>> >> >> maintainers who make it work. It has been a pleasure to be a part of >>> >> >> the community. >>> >> >> >>> >> >> I am interested in participating for GSoC this year and I would like >>> >> >> to work for this org during the summers if I am lucky. I particularly >>> >> >> want to work on improving the current ODE module as it is given in >>> >> >> the idea list. There is a lot of work that needs to be taken care of >>> >> >> like: >>> >> >> 1. Implementing solvers for solving constant coefficient >>> >> >> non-homogeneous systems >>> >> >> 2. Solving mixed order ODEs >>> >> >> 3. Adding rearrangements to solve the system >>> >> >> >>> >> >> These are not my ideas but I have taken inspiration from the ideas >>> >> >> page but I am up for working on these. If someone can guide me >>> >> >> regarding this then it would be really helpful. >>> >> > >>> >> > -- >>> >> > You received this message because you are subscribed to the Google >>> >> > Groups "sympy" group. >>> >> > To unsubscribe from this group and stop receiving emails from it, send >>> >> > an email to [email protected]. >>> >> > To view this discussion on the web visit >>> >> > https://groups.google.com/d/msgid/sympy/1033f581-abbb-4be5-a5b2-1988f4261535%40googlegroups.com. >>> >> >>> >> -- >>> >> You received this message because you are subscribed to the Google >>> >> Groups "sympy" group. >>> >> To unsubscribe from this group and stop receiving emails from it, send >>> >> an email to [email protected]. >>> >> To view this discussion on the web visit >>> >> https://groups.google.com/d/msgid/sympy/CAHVvXxTeWturK6WmtHKxakLqbV1yhp5_KoTPs8vPtmbu8%3D2VxQ%40mail.gmail.com. >>> > >>> > -- >>> > You received this message because you are subscribed to the Google Groups >>> > "sympy" group. >>> > To unsubscribe from this group and stop receiving emails from it, send an >>> > email to [email protected]. >>> > To view this discussion on the web visit >>> > https://groups.google.com/d/msgid/sympy/CAMrWc1BZKcwjFvVQwZZ80P6s-CP62Tn_VN30zBEdjmqhrN44DA%40mail.gmail.com. >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "sympy" group. >>> To unsubscribe from this group and stop receiving emails from it, send an >>> email to [email protected]. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/sympy/CAHVvXxRGFJC%2BGeowaNJcVFQsQsGq%2Bh0SW-jmYezsSzU5%3DvipcA%40mail.gmail.com. > > -- > You received this message because you are subscribed to the Google Groups > "sympy" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/sympy/CAMrWc1CYmTAwU4mFX%3DkOdZnmkzosN14VUAQBdteUETXas58n1w%40mail.gmail.com. -- You received this message because you are subscribed to the Google Groups "sympy" group. 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