Spectral Theory of the Klein–Gordon Equation in Pontryagin Spaces

Linear operators in spaces with an indefinite metric

Mathematics and Computers in Simulation · 1991 · 466 citations

Linear Operator, Linear Operators, Norm (Mathematics) +1

On The Existence of Stationary States of the Mesotron Field

L. I. Schiff, Hartland S. Snyder, J. Weinberg · Physical Review · 1940 · 149 citations

Spectral Theory, Quantum Science, Engineering +12

SPECTRAL THEORY AND DIFFERENTIAL OPERATORS (Oxford Mathematical Monographs)

J. Weiddman · Bulletin of the London Mathematical Society · 1989 · 138 citations

Spectral Theory, Oxford Mathematical Monographs, Humanities +8

Spectral Theory of the Klein–Gordon Equation in Pontryagin Spaces

Heinz Langer, Branko Najman, Christiane Tretter · Communications in Mathematical Physics · 2006 · 36 citations · Full text

Spectral Theory, Global Analysis

Scattering theory for the Klein-Gordon equation

Ricardo Weder · Journal of Functional Analysis · 1978 · 35 citations

Engineering, Physics, Quantum Field Theory +4