English

Non-normable spaces of analytic functions

Complex Variables 2024-08-05 v2

Abstract

For each value of pp such that 0<p<10<p<1, we give a specific example of two functions in the Hardy space HpH^p and in the Bergman space ApA^p that do not satisfy the triangle inequality. For Hardy spaces, this provides a much simpler proof than the one due to Livingston that involves abstract functional analysis arguments and an approximation theorem. For Bergman spaces, we have not been able to locate any examples or proofs in the existing literature.

Keywords

Cite

@article{arxiv.2407.21212,
  title  = {Non-normable spaces of analytic functions},
  author = {Iván Jiménez and Dragan Vukotić},
  journal= {arXiv preprint arXiv:2407.21212},
  year   = {2024}
}

Comments

In this version, a confusing comment has been corrected at the end of Section 1 (Introduction) and acknowledgments have been added. Also, some relevant comments have been made in the proof of Theorem 4 and right after it, as well as after Theorem 7

R2 v1 2026-06-28T17:58:45.400Z