Hi all, On 24 Mar 2010, at 18:58, Ondrej Certik wrote: > Here is one way (thanks again to Fernando for implementing the symarray!): > > In [1]: s = 17 > > In [2]: Bi1 = symarray(s, "B") > > In [3]: Ci1 = symarray(s, "C") > > In [4]: Add(*(Bi1*Ci1**4)) - S(1)/5 > Out[4]: > 4 4 4 4 4 4 4 > -1/5 + B₀⋅C₀ + B₁⋅C₁ + B₁₀⋅C₁₀ + B₁₁⋅C₁₁ + B₁₂⋅C₁₂ + B₁₃⋅C₁₃ + B₁₄⋅C₁₄ > > 4 4 4 4 4 4 4 4 > + B₁₅⋅C₁₅ + B₁₆⋅C₁₆ + B₂⋅C₂ + B₃⋅C₃ + B₄⋅C₄ + B₅⋅C₅ + B₆⋅C₆ + B₇⋅C₇ + > > 4 4 > B₈⋅C₈ + B₉⋅C₉
How would you recommend handling multiple summations, such as sum(sum(B[i]*A[i,j]*C[j],j,1,i),i,1,s)? Regards, Freddie. -- You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to sy...@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.
