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Applications of the Hahn-Banach Theorem, a Solution of the Moment Problem and the Related Approximation

Author

Listed:
  • Octav Olteanu

    (Independent Researcher, 061441 Bucharest, Romania
    Now retired.)

Abstract

We start by an application the of Krein–Milman theorem to the integral representation of completely monotonic functions. Elements of convex optimization are also mentioned. The paper continues with applications of Hahn–Banach-type theorems and polynomial approximation to obtain recent results on the moment problem on the unbounded closed interval [ 0 , + ∞ ) . Necessary and sufficient conditions for the existence and uniqueness of the solution are pointed out. Operator-valued moment problems and a scalar-valued moment problem are solved.

Suggested Citation

  • Octav Olteanu, 2024. "Applications of the Hahn-Banach Theorem, a Solution of the Moment Problem and the Related Approximation," Mathematics, MDPI, vol. 12(18), pages 1-18, September.
    • Handle: RePEc:gam:jmathe:v:12:y:2024:i:18:p:2878-:d:1478804
    as

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