{"paper":{"title":"The Ernst equation and ergosurfaces","license":"","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Gert-Martin Greuel, Piotr T. Chrusciel, Reinhard Meinel, Sebastian J. Szybka","submitted_at":"2006-03-13T01:56:31Z","abstract_excerpt":"We show that analytic solutions $\\mcE$ of the Ernst equation with non-empty zero-level-set of $\\Re \\mcE$ lead to smooth ergosurfaces in space-time. In fact, the space-time metric is smooth near a \"Ernst ergosurface\" $E_f$ if and only if $\\mcE$ is smooth near $E_f$ and does not have zeros of infinite order there."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"gr-qc/0603041","kind":"arxiv","version":2},"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"}