Showing math.FAShow all
2 papers · 1 filter
math.FA2025
On the relation between distances and seminorms on Fréchet spaces, with application to isometries
Isabelle Chalendar, Lucas Oger, Jonathan R. Partington
A study is made of linear isometries on Fréchet spaces for which the metric is given in terms of a sequence of seminorms. This establishes sufficient conditions on the growth of th…
math.FA2024
Linear isometries on the annulus: description and spectral properties
Isabelle Chalendar, Lucas Oger, Jonathan R. Partington
We give a complete characterisation of the linear isometries of , where is the half-plane, the complex plane or an annulus centered at 0 and symmetric to the unit…