Geodesic
Semi-Browder operators and perturbations
Studia Mathematica, Tome 122 (1997) no. 2, pp. 131-137

Voir la notice de l'article provenant de la source Institute of Mathematics Polish Academy of Sciences

An operator in a Banach space is called upper (resp. lower) semi-Browder if it is upper (lower) semi-Fredholm and has a finite ascent (resp. descent). An operator in a Banach space is called semi-Browder if it is upper semi-Browder or lower semi-Browder. We prove the stability of the semi-Browder operators under commuting Riesz operator perturbations. As a corollary we get some results of Grabiner [6], Kaashoek and Lay [8], Lay [11], Rakočević [15] and Schechter [16].
DOI : 10.4064/sm-122-2-131-137
Keywords: ascent, descent, semi-Fredholm

Vladimir Rakočević 1

1 
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Vladimir Rakočević. Semi-Browder operators and perturbations. Studia Mathematica, Tome 122 (1997) no. 2, pp. 131-137. doi: 10.4064/sm-122-2-131-137

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