1. Noninvertibility preservers on Banach algebras Creator: Kuzma, Bojan Format: bez média and svazek Type: model:article and TEXT Subject: linear preserver, noninvertible element, semisimple Banach algebra, and socle Language: English Description: It is proved that a linear surjection $\Phi \:\mathcal A\rightarrow \mathcal B$, which preserves noninvertibility between semisimple, unital, complex Banach algebras, is automatically injective. Rights: http://creativecommons.org/publicdomain/mark/1.0/ and policy:public