Generalized Riesz systems and ortonormal sequences in Krein spaces. (arXiv:1810.05218v1 [math-ph])

We analyse special classes of biorthogonal sets of vectors in Hilbert and in Krein spaces, and their relations with $\mathcal{G}$- quasi bases. We also discuss their relevance in some concrete quantum mechanical system driven by manifestly non self-adjoint Hamiltonians.查看全文

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