English

Approximate isometries of Hilbert spaces

Functional Analysis 2025-01-30 v1

Abstract

We improve the Hyers-Ulam stability result for isometries of real Hilbert spaces by removing the surjectivity assumption.

Keywords

Cite

@article{arxiv.2501.17672,
  title  = {Approximate isometries of Hilbert spaces},
  author = {Peter Semrl},
  journal= {arXiv preprint arXiv:2501.17672},
  year   = {2025}
}
R2 v1 2026-06-28T21:23:52.146Z