Safe numerical bounds for the Titchmarsh–Weyl m(λ)-function
B. Malcolm Brown, V. G. Kirby, W. D. Evans, Michael Plum · Mathematical Proceedings of the Cambridge Philosophical Society · 1993
Abstract Recent efforts have been focused on using numerical methods to estimate the Titchmarsh–Weyl m-coefficient. In this paper we look at interval analytic methods to provide provable bounds for these values.