I have a general question about index notation.
For an arbitrary quantity, a,
"a" denotes a scalar quantity.
"a_i" denotes a vector.
"a_ij" denotes a 2nd-order tensor.
So, if I have something like "a_i*e_ij*b_j"
Would this be like multiplying an nx1 vector, an mxm matrix, and an Lx1 vector...