{"paper":{"title":"Outer functions and divergence in de Branges-Rovnyak spaces","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"math.CV","authors_text":"Javad Mashreghi, Thomas Ransford","submitted_at":"2019-02-15T18:00:14Z","abstract_excerpt":"In most classical holomorphic function spaces on the unit disk in which the polynomials are dense, a function $f$ can be approximated in norm by its dilates $f_r(z):=f(rz)~(r<1)$, in other words, $\\lim_{r\\to1^-}\\|f_r-f\\|=0$. We construct a de Branges-Rovnyak space ${\\mathcal H}(b)$ in which the polynomials are dense, and a function $f\\in{\\mathcal H}(b)$ such that $\\lim_{r\\to1^-}\\|f_r\\|_{{\\mathcal H}(b)}=\\infty$. The essential feature of our construction lies in the fact that $b$ is an outer function."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.05916","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}