2 papers
math.RA2026
Additive preservers of permanent rank
Alexander Guterman, Bojan Kuzma, Leonid Ovchinnikov
The permanent rank of a matrix is the size of the maximal square submatrix in which has a nonzero permanent. In this paper we characterize additive transformations whi…
math.OA2025
On preservers of strong Birkhoff-James orthogonality between -algebras
Bojan Kuzma, Srdjan StefanoviÄ, Ryotaro Tanaka
It is shown that every linear strong Birkhoff-James isomorphism between unital -algebras is a -isomorphism followed by a unitary multiplication. Moreover, as a partial exte…