The bispectral problem, the Darboux process, monodromy and the Hermite operator

M. M. Castro, F. A. Grünbaum

The complete solution of the bispectral problem for the Schrödinger operator $L=-\frac{d^2}{d{x}^2}+V(x)$ in [DG] (J. J. Duistermaat and F. A. Grünbaum, Differential equations in th…