20 citations · 113 across the 17 of their papers we have counts for
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math.FA2019★ 3 cited
On compressions and generalized spectra of operators over C*-algebras
Stefan Ivkovic
In the classical operator theory, there are several versions of spectra, related to special classes of operators (Fredholm, semi-Fredholm, upper/lower semi-Fredholm,etc.). We gener…
math.FA2019★ 6 cited
On upper triangular operator matrices over C*-algebras
Stefan Ivkovic
We study adjointable, bounded operators on the direct sum of two copies of the standard Hilbert C*-module over a unital C*-algebra A that are given by upper triangular 2 by 2 opera…