Tim, Thanks! I generated a ticket at:
https://github.com/sympy/sympy/issues/8516 -Shawn On Monday, November 24, 2014 9:29:30 PM UTC-5, Tim Lahey wrote: > > It appears that it's a bug. If you have access to GitHub, report an > issue with the details. I'd recommend including the Mathematica result > so a test case can be made. > > Thanks, > > Tim. > > On 24 Nov 2014, at 21:19, Yuxiang Wang wrote: > > > Hi Tim, > > > > Thank you! I did try that, but it still hang there... > > > > from sympy.abc import x, y, z, a, b, c > > from sympy import solve, solve_poly_system > > > > solve_poly_system([x+y+z-a, x*y+y*z+x*z-b, x*y*z-c], [x, y, z]) > > > > > > In fact, I had the impression that when I used the keyboard to > > interrupt > > the solve() earlier today, it showed it is trying to use the > > polynomial > > solver. > > > > Shawn > > > > > > > > On Monday, November 24, 2014 9:13:46 PM UTC-5, Tim Lahey wrote: > >> > >> Hi, > >> > >> You might try the polynomial module solve support. See, > >> > >> > http://docs.sympy.org/latest/modules/polys/basics.html#solving-equations > >> > >> Cheers, > >> > >> Tim. > >> > >> On 24 Nov 2014, at 20:26, Yuxiang Wang wrote: > >> > >>> Hi all, > >>> > >>> I have this equation, which is Vieta's formula and is polynomial. > >>> > >>> SymPy code: didn't work... just hang there > >>> > >>> from sympy.abc import x, y, z, a, b, c > >>> from sympy import solve > >>> > >>> solve([x+y+z-a, x*y+y*z+x*z-b, x*y*z-c], [x, y, z]) > >>> > >>> Mathematica worked. > >>> > >>> Solve[{x + y + z == a, x y + y z + x z == b, x y z == c}, {x, y, z}] > >>> > >>> I do know the answer of this equation, but I was wondering... this > >>> seems to > >>> be a question that should work in sympy because it does not appear > >>> too > >>> difficult to me - only polynomials. Any thoughts? > >>> > >>> > >>> Shawn > >>> > >>> -- > >>> 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+un...@googlegroups.com <javascript:>. > >>> To post to this group, send email to sy...@googlegroups.com > >> <javascript:>. > >>> 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/8e42eaf3-da4e-47ff-b98b-df46d1fcf2d2%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 sympy+un...@googlegroups.com <javascript:>. > > To post to this group, send email to sy...@googlegroups.com > <javascript:>. > > 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/ea90bce7-cca7-442e-a6e8-d95450c92c22%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 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/0f8dfdc5-4303-4743-a4fd-3e650ecc4823%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
