On Sun, Nov 18, 2012 at 8:16 PM, Shriramana Sharma <samj...@gmail.com> wrote: > > ...: summation(lamb[i]*(-1)**(n-j)*binomial(i,n-j),(i,n-j,n))
One logical error I found in the above line is that j doesn't have a definite (integer) value, so how can summation run i from n-j to n, but even when I added at the head of the above statement: for j in range(n+1): ... I still get the same error. Obviously, Python is still trying to prematurely evaluate lamb[i]. I then tried to do an indirection by defining: def getlamb(i): return lamb[i] ... and replacing lamb[i] by getlamb(i), but still the same premature evaluation happens. Please help! -- Shriramana Sharma -- 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.
