Hryniv R and Mykytyuk Ya. On the first trace formula for Schrödinger operators // J. Spectr. Theory. Electronically published on March 15, 2021. https://www.doi.org/10.4171/JST/348
Abstract:
We prove that the so-called first trace formula holds for all Schrödinger operators on the line with real-valued integrable potentials.