Hi, I would like to ask a simple question about how autodiff works for vector/matrix. For an instance, if we have C = A.*B where A, B, C are all matrices. When calculating the jacobian matrix of C w.r.t A. does autodiff expand C=A.*B into C_ij= A_ij * B_ij and calculate derivative, or autodiff keeps a rule about this and directly form a result? Thanks in advance for the help.