Most people aren't good combinatorists. SymPy should be able to do this for you.
Aaron Meurer On Nov 15, 2012, at 8:59 AM, Simon Clift <sscl...@gmail.com> wrote: Aha. Here's a tidy expression: http://en.wikipedia.org/wiki/Inclusion%E2%80%93exclusion_principle That's what I was looking for. Combinatorics is not my field... clearly... :( On Wednesday, 14 November 2012 16:15:24 UTC-5, Simon Clift wrote: > > On Wednesday, 14 November 2012 15:56:16 UTC-5, Matthew wrote: >> >> There are two different systems in sympy to represent facts; these are >> our two assumptions systems. >> ... >> This has been one of the top issues in SymPy for a long while. If we had >> some mechanism to associate bounties to issues this would probably have the >> highest. >> > > Thanks again for your help, this puts it into context. > -- You received this message because you are subscribed to the Google Groups "sympy" group. To view this discussion on the web visit https://groups.google.com/d/msg/sympy/-/Bk4yrPFD4pEJ. To post to this group, send email to sympy@googlegroups.com. To unsubscribe from this group, send email to sympy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sympy?hl=en. -- You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to sympy@googlegroups.com. To unsubscribe from this group, send email to sympy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sympy?hl=en.
