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math.FA2024
On Positive Vectors in Indefinite Inner Product Spaces
Fabio Bagarello, Sergiusz Kuzel
Let be a linear space equipped with an indefinite inner product . Denote by the nonlinear set of…
math-ph2024
A new family of ladder operators for macroscopic systems, with applications
Fabio Bagarello
In a series of recent scientific contributions the role of bosonic and fermionic ladder operators in a macroscopic realm has been investigated. Creation, annihilation and number op…