Noninvertibility preservers on Banach algebrasKuzma, Bojan (Avtor) mathematicsfunctional analysislinear preservernoninvertible elementsemisimple Banach algebrasocleIt is proved that a linear surjection ▫$\Phi: \mathcal{A} \to \mathcal{B}$▫, which preserves noninvertibility between semisimple, unital, complex Banach algebras, is automatically injective.20062013-10-15 12:09:36Delo ni kategorizirano4062ISSN: 0011-4642UDK: 517.982.2COBISS.SI-ID: 14132825sl