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Weak invertibility and strong spectrum

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Meyer M. J.

Studia Mathematica

1993

tom 105

nr 3

255-269

A notion of weak invertibility in a unital associative algebra A and a corresponding notion of strong spectrum of an element of A is defined. It is shown that many relationships between the Jacobson radical, the group of invertibles and the spectrum have analogues relating the strong radical, the set of weakly invertible elements and the strong spectrum. The nonunital case is also discussed. A characterization is given of all (submultiplicative) norms on A in which every modular maximal ideal M ⊆ A is closed.

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1 Studia Mathematica

1 Meyer M. J.

1 1993

Wyniki wyszukiwania

Weak invertibility and strong spectrum