Greetings, I am using sympy for the first time, and attempting to do matrix multiplication like the following
sum_{l,m} U[i,l] G[l,m] D[j,m] I want to do regular matrix multiplication, but only on one of the two indices for the objects U and D, in my case for a known G (I want to put numerical entries for the matrix G). I was hoping to have this print out a symbolic expression. I found sympy.MatrixSymbol to create a symbolic representation for U and D, but it seems I need some functionality from sympy.tensor class to handle this type of multiplication. Does anyone have, or could anyone write down a simple example doing such a multiplication? Let me make a simple specific example. Let G = sympy.Matrix([[0,1], [-1,0]]) # # [ 0 1 ] # [ -1 0 ] So, in the above example, leaving i,j arbitrary, this would result in U[i,0] D[j,1] - U[i,1] D[j,0] I also want to multiply this by a G[i,j], but knowing how to do the above I think will be sufficient for the complete multiplication. Thanks, Andre -- 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 https://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/b51fda12-c828-439b-bc14-51915ff6996d%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.