2 papers
math.FA2002
Nonsurjective nearisometries of Banach spaces
Peter Semrl, Jussi Vaisala
We obtain sharp approximation results for into nearisometries between Lp spaces and nearisometries into a Hilbert space. Our main theorem is the optimal approximation result for ne…
math.OA2000
Local automorphisms of the unitary group and the general linear group on a Hilbert space
Lajos Molnar, Peter Semrl
We prove that every 2-local automorphism of the unitary group or the general linear group on a complex infinite-dimensional separable Hilbert space is an automorphism. Thus these t…