Just a note that sympy.physics.vector.Dyadic is yet another tensor form in SymPy.
Jason moorepants.info +01 530-601-9791 On Wed, Mar 5, 2014 at 1:35 PM, Ondřej Čertík <ondrej.cer...@gmail.com>wrote: > Hi Kasper, > > On Wed, Mar 5, 2014 at 11:27 AM, Kasper Peeters > <kasper.peet...@gmail.com> wrote: > >> Personally I would like to see more cohesion among tensor-like projects. > >> There are a lot of tensor-like or indexed things in SymPy that all have > >> valuable logic, none of which stem from some common framework. The > original > >> idea behind tensor core was to have some base layer from which all of > the > >> systems could benefit and from which pairs of systems could use to > interact. > > > > > > It is going to be very difficult, if not impossible, to get a uniform > core > > that satisfies all needs. So the best one can do is, as you pointed out > in > > another email, to first identify a suitable class of problems that you > would > > like to solve, and then build the infrastructure around that. > > > > To add some more input to this discussion: I am the author of Cadabra, an > > open source tensor computer algebra system (http://cadabra.phi-sci.com/). > I > > am at present working on a major overhaul of the code, which allows you > to > > use all functionality from within Python, and use Sympy to do > computations > > with the individual components of tensors. One thing you might consider > (but > > I don't want to force this down anyone's throat) is to help me build that > > Cadabra-Sympy interface, instead of doing a full tensor module within > Sympy > > from scratch. I'm happy to discuss this in more detail if anyone's > > interested. > > Thanks for the email. Would you be willing to license your code under > BSD style license? > > Btw, since your code is in C++, maybe you can help us with CSymPy > (https://github.com/certik/csympy), > which is also a pure C++ library, with optional Python wrappers. In > particular, do you have some applications, > where SymPy is too slow? Since you chose to use C++ in Cadabra, I > assume you might have some applications > where using Python would be too slow. What I am trying to say is that > there might be more ways we can collaborate > on any of these things. > > Ondrej > > -- > 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. > To view this discussion on the web visit > https://groups.google.com/d/msgid/sympy/CADDwiVAuMwscSnxrUtEtWBfj_ueiguHCeRjt0XYq8qocrZjTEQ%40mail.gmail.com > . > For more options, visit https://groups.google.com/groups/opt_out. > -- 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. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/CAP7f1AjNhkEDTEG7LWdJ7ruSf_ADUBpUbmdtBLLBWEV2X7mAcg%40mail.gmail.com. For more options, visit https://groups.google.com/groups/opt_out.
