2 papers
math-ph2019
Generalized Riesz systems and quasi bases in Hilbert space
Fabio Bagarello, Hiroshi Inoue, Camillo Trapani
The purpose of this article is twofold. First of all, the notion of -quasi basis is introduced for a pair of dense subspaces of Hilbert spaces. This consists of tw…
math-ph2016
Regular biorthogonal pairs and Psuedo-bosonic operators
Hiroshi Inoue, Mayumi Takakura
The first purpose of this paper is to show a method of constructing a regular biorthogonal pair based on the commutation rule: for a pair of operators and acting…