English

Complete Norm Preserving Extensions of Holomorphic Functions

Complex Variables 2022-04-20 v1

Abstract

We show that for every connected analytic subvariety VV there is a pseudoconvex set Ω\Omega such that every bounded matrix-valued holomorphic function on VV extends isometrically to Ω\Omega. We prove that if VV is two analytic disks intersecting at one point, if every bounded scalar valued holomorphic function extends isometrically to Ω\Omega, then so does every matrix-valued function. In the special case that Ω\Omega is the symmetrized bidisk, we show that this cannot be done by finding a linear isometric extension from the functions that vanish at one point.

Keywords

Cite

@article{arxiv.2204.08521,
  title  = {Complete Norm Preserving Extensions of Holomorphic Functions},
  author = {Jim Agler and Lukasz Kosinski and John E. McCarthy},
  journal= {arXiv preprint arXiv:2204.08521},
  year   = {2022}
}
R2 v1 2026-06-24T10:51:25.481Z