I have two matricies which represenet 2D convolutional filters, lets call them $W_1$ and $W_2$.
I want to make the inner product of the "flattened" versions of these variables to be 0. I.e. $flatten(W_1)^T flatten(W_2)=0$.
Is there a compact way to write this expression without using "flatten" funciton where the flatten function returns a columm vector of the matrix.