In En the quantities Bij are the components of an affine tensor of rank 2. Construct two affine tensors each of rank 4, with components Cijkl and Dijkl for which
∑k ∑l Cijkl Bkl = Bij + Bji
∑k ∑l Dijkl Bkl = Bij - Bji
The Attempt at a Solution
Can anyone give me a hint on how to start? I just don't know how to start.