We know if we have two matrices $A$ and $B$ then:
$(A\otimes B )^{-1} = A^{-1} \otimes B^{-1}$
Now if we have four matrices $A,B,C,D$ . Is there an equivalent term for the following?
$((A\otimes B)+ (C\otimes D))^{-1}$
which can reduce the cost computation and memory usage.
