For a bounded linear operator, by local spectral theory methods, we study the property (bz),
which means that the difference of the approximate point spectrum with the upper semi …

In this article, a-Browder's classical theorem is considered through the property (B v), and we
show that if two operators are norm equivalent, then property (B v) holds for one if and only if …

In this paper, we introduce and study the spectral property $(E_A) $. This property means
that the difference between the approximate point spectrum and the upper semi-Fredholm …