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Article Citation - WoS: 64Citation - Scopus: 68On the Concept of Spectral Singularities(indian Acad Sciences, 2009) Guseinov, Gusein ShIn this paper, we discuss the concept of spectral singularities for non-Hermitian Hamiltonians. We exihibit spectral singularities of some well-known concrete Hamiltonians with complex-valued coefficients.

