Biorthogonal vectors, sesquilinear forms and some physical operators
arXiv:1802.09559 · doi:10.1063/1.5020427
Abstract
Continuing the analysis undertaken in previous articles, we discuss some features of non-self-adjoint operators and sesquilinear forms which are defined starting from two biorthogonal families of vectors, like the so-called generalized Riesz systems, enjoying certain properties. In particular we discuss what happens when they forms two $\D$-quasi bases.
arXiv commentin press in Journal of Mathematical Physics
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