Motivated by recent investigations on norm-additive and spectrally multiplicative maps on
various spaces of functions, in this paper we determine all bijective transformations between …

Preserver Problems Related to Quasi-Arithmetic Means of Invertible Positive Operators
Page 1 Integr. Equ. Oper. Theory (2018) 90:7 https://doi.org/10.1007/s00020-018-2426-x …

In this paper, we determine the structure of Schatten p-norm additive maps on the set of
positive invertible elements of a C^* C∗-algebra carrying a faithful normalized trace. It turns …

In this paper, we determine the general form of transformations on positive operators
preserving ap-norm of a power mean with positive exponent. The corresponding theorems …

In this paper, we study surjective maps (p: E+—► F+ between positive cones of two ordered
Banach spaces E and F, which preserve norm of sums, ie,\\< p (x)+< p (y)\\=\\x+ y\\, Vx, yeE+ …

In this paper, we mainly discuss the problem of describing the structure of transformations
leaving norms of generalized weighted quasi-arithmetic means of invertible positive …

Preservers for the Tsallis Entropy of Convex Combinations of Density Operators - Fang -
2018 - Advances in Mathematical Physics - Wiley Online Library Skip to Article Content Skip …

The topic of the dissertation falls into the area of preserver problems. The dissertation
consists of five chapters followed by a summary (both in English and in Hungarian) and a …

We aim to characterise those transformations on the set of density operators (which are the
mathematical representatives of the states in quantum information theory) that preserve a so …

A jelen disszertáció néhány eredményt tartalmaz a megorzési problémák területérol. Az
ilyen problémákat általánosan a következoképpen tudjuk megfogalmazni. Legyen adott egy …