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Subjects
46-XX Functional analysis
46Hxx Topological algebras, normed rings and algebras, Banach algebras
46H10 Ideals and subalgebras

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Noninvertibility preservers on Banach algebras

Bojan Kuzma (2006)

Czechoslovak Mathematical Journal

It is proved that a linear surjection $Φ 𝒜 \to ℬ$ , which preserves noninvertibility between semisimple, unital, complex Banach algebras, is automatically injective.

Normally subregular systems in normed algebras

Béla Bollobás (1974)

Studia Mathematica

Currently displaying 1 – 2 of 2

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