On Fri, Mar 21, 2014 at 3:29 AM, mario <[email protected]> wrote: > > Here is an idea for a simple deliverable on the topics you mention: > maybe it might interest you: > computation of group invariants (Casimir, etc.) using tensors and > Feynman graphs; there is a book by Cvitanovic "Group theory" on this. > I have a closed PR https://github.com/sympy/sympy/pull/1699 on this,
Yes. Peter, I forgot to mention that Mario Pernici is another person you want to follow, since he has done tons of work in this area with SymPy. Ondrej > see group_factors.py and tests, in which I compute the 4 loop graph in > Cvitanovic eq.(1.1). > I did only the U(N) case, I did not write Feynman rules, so there > is a lot on work on this; one can consider also zero dimensional field > theories with 'fields' belonging to some representation. > > Well, it is not really simple, but it is much simpler than doing the same in > d=4 field theory, > it is a useful toy model for that. > > > On Thursday, March 20, 2014 10:48:39 AM UTC+1, Peter Petrov wrote: >> >> Hi everyone, >> >> I just found out about GSoC several days ago and it immediately struck me >> as being amazing. I have been trying to get involved in the open source >> community for a while now, but haven't been able to "find the time". I am >> currently in a PhD program working on theoretical physics (string theory), >> but have been doing quite a lot of tinkering with computer science in >> general lately and it has been really fascinating. GSoC seems like the exact >> type of thing to push me and keep me on track to start contributing >> seriously to open source projects and get my hands dirty with "real" coding. >> I immediately jumped on the SymPy page and started playing around with the >> packages. It's a little overwhelming how much is being developed >> simultaneously, but I am getting a feel for some of the interesting >> features. >> >> I know it is a long shot to get approved for the GSoC, since I see most >> people have started working on proposals so early on, but I am still going >> to try and if it doesn't work I will at least have learned enough to start >> working on something interesting even without the funding (it would help >> though, since I will be able to devote more time to it over the summer). >> >> I wanted to get some feedback about my ideas, which I realize might not >> happen by the deadline (24ish hours left), but even so I would appreciate >> it. I am trying to have a decent proposal by then, which might not be very >> concrete (more of a conceptual plan) and hoping to have several days after >> the melange deadline to develop it fully once I hear from you. I am not sure >> how the review process works, but I would appreciate some feedback from the >> mentors if you would be willing to consider a proposal modified after the >> official deadline, since I see there is a period of several weeks of review. >> That is so I know if I should slave away on it the days after the deadline, >> or if there's no point. >> >> I am also trying to fix an issue and submit a pull request by the >> deadline, which is not going too well since I have started looking at SymPy >> only for the past several days. Fingers crossed though. Anyways I just >> uploaded a wiki page with my current general ideas (nothing specific yet, >> but I have one more day). Any feedback or references to discussions >> surrounding the topics I am looking at would be greatly appreciated. I have >> been digging through the doc files and the mailing list, but someone with >> experience might be able to point me to something I have not discovered yet. >> >> Thank you in advance for any help. This looks like a great community and I >> look forward to talking with you more and hopefully contributing. >> >> Peter Petrov > > -- > 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 post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/sympy. > To view this discussion on the web visit > https://groups.google.com/d/msgid/sympy/f0eca522-e0b7-4072-93d1-a0723b5271df%40googlegroups.com. > > For more options, visit https://groups.google.com/d/optout. -- 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 post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/CADDwiVBNX-4UxaN-m%2BeGUWiGPzN-j%3DrvBfG5w9h%2BzC5WH_u_Pw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
