Convergence of the diagonal operator-valued Padé approximants to the Dyson expansion
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The diagonal operator-valued Padé approximants formed from the Dyson expansion to the Schrödinger time-evolution operator are shown to converge everywhere in the complex plane, except on a certain subset of the real axis. © 1975 Springer-Verlag.
author list (cited authors)
Narcowich, F. J., & Allen, G. D.