2 papers
math.FA2026
On the ascent and the angle between the null space and the range of elementary operators
Janko Bračič, Bojan Kuzma, Hranislav Stanković
We study the angle between the null space and the range of elementary operators of length one or two acting on , the Banach algebra of all bounded linear…
math.RA2026
Additive preservers of mutual strong Birkhoff-James orthogonality on finite-dimensional -algebras
Bojan Kuzma, Srdjan Stefanović
We describe additive surjections on direct sum of matrix algebras that preserve singularity in one direction. As an application, we classify additive surjections on finite-dimensio…