Samsonov, Boris F.; Roy, Pinaki Is the \({\mathcal C}{\mathcal P}{\mathcal T}\) norm always positive? (English) Zbl 1065.81048 J. Phys. A, Math. Gen. 38, No. 15, L249-L255 (2005). Cited in 1 ReviewCited in 8 Documents MSC: 81Q05 Closed and approximate solutions to the Schrödinger, Dirac, Klein-Gordon and other equations of quantum mechanics 34B24 Sturm-Liouville theory 34L05 General spectral theory of ordinary differential operators 81U15 Exactly and quasi-solvable systems arising in quantum theory PDF BibTeX XML Cite \textit{B. F. Samsonov} and \textit{P. Roy}, J. Phys. A, Math. Gen. 38, No. 15, L249--L255 (2005; Zbl 1065.81048) Full Text: DOI arXiv OpenURL