Preprint
Oct 2026
Ordinary algebras of complex-valued functions
A classical theorem due to Gleason, Kahane, and Zelazko states that every complex unital Banach algebra is ordinary, meaning that any linear functional mapping elements into their spectrum is a character. While Roitman and Sternfeld extended this property to algebras with bounded spectra-showing in particular that the...
K. Boulabiar
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