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math.FA2019
Maps on positive cones in operator algebras preserving power means
Lajos Molnár
In this paper we consider power means of positive Hilbert space operators both in the conventional and in the Kubo-Ando senses. We describe the corresponding isomorphisms (bijectiv…
math.FA2019
On 2-local *-automorphisms and 2-local isometries of B(H)
Lajos Molnár
It is an important result of \v Semrl which states that every 2-local automorphism of the full operator algebra over a separable Hilbert space is necessarily an automorphism. In th…