6533b85ffe1ef96bd12c1d2e

RESEARCH PRODUCT

Absolutely Convergent Extensions of Nonclosable Positive Linear Functionals

Salvatore TrioloCamillo TrapaniGiorgia Bellomonte

subject

Discrete mathematicsExtensions Positive linear functionalsSettore MAT/05 - Analisi MatematicaPositive linear functionalGeneral MathematicsSubalgebraExtension (predicate logic)Algebra over a fieldMathematics::Representation TheoryAbsolute convergenceMathematics

description

The existence of extensions of a positive linear functional ω defined on a dense *-subalgebra \({\mathfrak{A}_0}\) of a topological *-algebra \({\mathfrak{A}}\), satisfying certain regularity conditions, is examined. The main interest is focused on the case where ω is nonclosable and sufficient conditions for the existence of an absolutely convergent extension of ω are given.

https://doi.org/10.1007/s00009-010-0027-2