Hi, This topic is extensively discussed earlier in mailing list. What I have here [0] is essentially correct though inefficient implementation of addition and subtraction operations for sparse matrix. This is the time where I need to think about adding domains support to matrices. I can think of two approaches to attack this problem--
1. Naive approach : adding domain as a third parameter like add(m1, m2, K) and then using domain's arithmetic operations in the body. 2. Just continue the way it is and adding domains in the system later as appropriate. I think 2 is the way to go because of the uncertain design of the system[1]. As far as I understand, adding domains means we are simulating static typed languages. I think we should not mimic Polys Design as it is, because I am afraid what worked for polys may not work here[2]. I personally think that I should keep submitting small changes and if we can find with sufficient confidence how domains are to be incorporated. I am now working assuming that this is a completely open problem. -Saurabh [0] https://github.com/sympy/sympy/pull/2190 [1] http://www.google-melange.com/gsoc/proposal/review/google/gsoc2013/saurabh_jha/11001 [2] http://mattpap.github.io/masters-thesis/html/index.html -- 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. For more options, visit https://groups.google.com/groups/opt_out.
