2 problems

Matrix inverse realization conjecture. Each entry of $\mathfrak A^{-1}$ is a noncommutative rational expression in the entries of $\mathfrak A$: there exist noncommutative rational…

Let $A\in\mathbb{R}^{n\times n}$ be a nonsingular matrix whose inverse has only nonzero elements in the lower triangle. Let $X$ be the inverse computed numerically by algorithm (KW…