T. Petek

collaborators

2 papers

math.FA2025

Maps preserving the idempotency of Jordan products

Tatjana Petek, Gordana RadiÄ

Let B(X) be the algebra of all bounded linear operators on a complex Banach space X of dimension at least three. For an arbitrary nonzero complex number t we determine the form of…

math.RA2024

Characterizing Jordan embeddings between block upper-triangular subalgebras via preserving properties

Ilja GogiÄ, Tatjana Petek, Mateo TomaÅ¡eviÄ

Let $M_{n}$ be the algebra of $n \times n$ complex matrices. We consider arbitrary subalgebras $A$ of $M_{n}$ which contain the algebra of all upper-triangular matrices (i.e.…