9/13    If i have an Cholesk decomposition for a banded diagonal matrix,
        is there an easy way to recover the corresponding bands of the
        inverse of that matrix? i am only interested in recovering the bands,
        not the full inverse.
        \_ No.
        \_ Yes.
        \_ I'm not going to answer because you were a fucking know it all
           rahimi dickhead giving people a bad time in the computer lab and
           everyone around you disliked you intensely. Thought you should
           know this so that you'll improve your personality in da future