Given a real positive $n\times n$ matrix, what would the following Fourier Transform be:
I'm quite confused by $(Ax,x)$. I assumed it's a vector, and $Ax$ should be a $n\times 1$ vector, so $(Ax,x)$ is going to be a $2n\times 1$ vector. But I feel this might not be correct. Even if it is, I'm not particularly sure how to proceed. Everything I know about Fourier Transforms is pretty basic, so I assume this might be really trivial, but I'm honestly not sure how to compute it. Any help would be greatly appreciated, thanks.