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Notes on the Krupa-Zawisza Ultrapower of Self-Adjoint Operators
Hiroshi Ando, Izumi Ojima, Hayato Saigo
It is known that there is a difficulty in constructing the ultrapower of unbounded operators. Krupa and Zawisza gave a rigorous definition of the ultrapower A^{omega} of a selfadjo…
math.FA2013
Indeterminacy of the moment problem for symmetric probability measures
Hayato Saigo, Hiroki Sako
In this paper, the moment problem for symmetric probability measures is characterized in terms of associated sequences called Jacobi sequences . A notion named property (S…