1. 70 let Jiřiny Šiklové - aneb nejen o genderové rovnosti Creator: Maříková, Hana Format: print Type: model:internalpart and TEXT Language: Czech Rights: http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
2. 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