Well i no this a silly question but i just want to know. There are two matrices $R'$ and $R$. We know that $R'$ is a diagonal matrix and we know $R$ and we also know that $R$ is a symmetric matrix. Now we have to find a matrix $A$ such that
$R'$=$ARA^{T}$
I can solve it in brute force method but I am sure there is another clever method to solve this one.We know that all the matrices are 3X3 matrices
Thanks in Advance