Eigenvectors From Eigenvalues: The Case of One-Dimensional Schr\"odinger Operators

We revisit an archive submission by P. B. Denton, S. J. Parke, T. Tao, and X. Zhang, arXiv:1908.03795, on $n\times n$ self-adjoint matrices from the point of view of self-adjoint Dirichlet Schr"odinger operators on a compact interval.