Spectral Subspaces of Sturm-Liouville Operators and Variable Bandwidth

Mark Jason Celiz, Karlheinz Gröchenig, Andreas Klotz

We study spectral subspaces of the Sturm-Liouville operator $f\mapsto -(p{f}^{\prime }{)}^{\prime }$ on $\mathbb{R}$, where $p$ is a positive, piecewise constant function. Functions in these subspaces…