@Aaron, this is the link to my blog - http://codesachin.blogspot.in/ I am not that acquainted with RSS and feeds, but is this what you need? - http://codesachin.blogspot.in/feeds/posts/default
On Tue, May 28, 2013 at 7:30 PM, Aaron Meurer <asmeu...@gmail.com> wrote: > On May 28, 2013, at 5:30 AM, Stefan Krastanov <krastanov.ste...@gmail.com> > wrote: > > Oh, one more thing. About actually representing your objects. Sympy > roughly follows the following requirement `type(obj)(*obj.args)==obj`. It > is rather important detail. > > Check out this https://github.com/sympy/sympy/wiki/Args-Invariant and > please learn why this invariant is important (tree traversal and > rebuilding, etc). > > > That wiki page delves deep into the discussion about what the invariant > should be. For a lighter discussion, see the section of my new tutorial > http://docs.sympy.org/tutorial/tutorial/manipulation.html (comments > welcome). > > Aaron Meurer > > > At the moment we have problems deciding how exactly we should deal with > the corner cases, but hopefully this will be fixed before you start your > projects. I can not stress how important of a detail this is. > > > On 28 May 2013 12:23, Stefan Krastanov <krastanov.ste...@gmail.com> wrote: > >> Hi Sachin and Prasoon, >> >> I have also CCed Aaron, Gilbert and the mailing list as a whole. If you >> have questions send them publicly to the mailing list, not privately to the >> mentors (unless you consider the issue to really be a private matter) >> >> First of all, congratulations! >> >> Be sure to setup blogs for gsoc (or a gsoc category with a dedicated rss >> feed if you want to reuse a personal blog). >> >> We also encourage you to help with reviews during your projects. For >> instance, set aside a few hours or even a whole afternoon each week >> dedicated to pull request reviews (checking the code for antipatterns, >> pulling it and playing around with the new functionality, checking >> coverage, etc). In your case this would be easier as anyway you will need >> to review each others work, but checking other pull request from time to >> time would be beneficial. >> >> During the application period we also asked you to comment on each-others >> applications. It would be great if you can share those comments now. You >> are probably going to get as much help from each other as you will get from >> Gilbert, me and the community. >> >> I suggest that we set up a wiki page where you can work together and >> propose the api for the vectors. A possible way to start would be for >> Prasoon to copy the examples given by Sachin in his application and >> complement/fix them as he sees fit and for Sachin to do the same with >> Prasoon's examples (only the vector relate examples in both cases). >> >> Also, it would be great if you can provide a mock SymPy session for the >> following problem (it is from electromagnetism because of Sachin's project, >> but focus for now only on the vectors api). >> >> 1. (the space) In 3D flat space. >> 2. (scalar fields) Create a scalar field `rho` which is to represent a >> planar charge density with a Gaussian cross-section. For instance in >> Cartesian or cylindrical coordinates rho=exp(-z^2). >> 3. (vector fields) Create a vector field `B` which is constant in time, >> homogeneous in space, pointing in the z direction. >> 4. (vectors that are not vector fields) Set up a particle at some >> arbitrary coordinates with some arbitrary initial velocity. >> 5. (trajectories, parametrized lines) Imagine that you have a black box >> which takes the world as input and outputs a trajectory for the particle. >> Give the api for that black box. >> >> >> And the following is more related to the Sachin's project, but after you >> finish 1-5 I hope you can both comment on it: >> >> 6. (parametrized fields) how will 2 and 3 look if they depend on time >> 7. (Maxwell) given rho, E and B derive the PDEs governing them. Assume >> there are NO point particles. >> 7a. (Maxwell) given 2 and 3 (or 6) derive the electric field (again >> assume you have a black box for the algorithm and provide only an api) >> >> And this one is rather advanced, you can leave it out for now: >> >> 8. (no particles) Instead of defining 4 and 5, just use DiracDelta >> fields. This is done in Jackson. >> 9. What about other degenerate fields besides point particles in the form >> of DiracDelta. What about line and surface charges. >> >> In any case, do not just to questions 6-9. Take your time and respond in >> details to 1-5. And please do it in a well formated wikipage, not here on >> the mailing list. >> >> Stefan >> > > -- 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 sympy+unsubscr...@googlegroups.com. To post to this group, send email to sympy@googlegroups.com. Visit this group at http://groups.google.com/group/sympy?hl=en-US. For more options, visit https://groups.google.com/groups/opt_out.
