{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:N44XH3Z6KUGYOJ73QKJIWHXRKG","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"e2e55f601a2cab2f32d91cf2ec3e21147102d4d00de70a6272b1b7a9bc4f780d","cross_cats_sorted":["hep-th","math-ph","math.AP","math.DG","math.MP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-10-06T17:11:15Z","title_canon_sha256":"f55de56fff64a03d8a4ed47efa3f01be7b9abbfe6871543eccacf24a66c9de9e"},"schema_version":"1.0","source":{"id":"1810.03026","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.03026","created_at":"2026-07-05T01:35:22Z"},{"alias_kind":"arxiv_version","alias_value":"1810.03026v2","created_at":"2026-07-05T01:35:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.03026","created_at":"2026-07-05T01:35:22Z"},{"alias_kind":"pith_short_12","alias_value":"N44XH3Z6KUGY","created_at":"2026-07-05T01:35:22Z"},{"alias_kind":"pith_short_16","alias_value":"N44XH3Z6KUGYOJ73","created_at":"2026-07-05T01:35:22Z"},{"alias_kind":"pith_short_8","alias_value":"N44XH3Z6","created_at":"2026-07-05T01:35:22Z"}],"graph_snapshots":[{"event_id":"sha256:34560b9e1c6e07fff76fc08e8ee4b8d7a391714cf25a5b2f8bf7b4e55fb1c9d8","target":"graph","created_at":"2026-07-05T01:35:22Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1810.03026/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Some exotic compact objects possess evanescent ergosurfaces: timelike submanifolds on which a Killing vector field, which is timelike everywhere else, becomes null. We show that any manifold possessing an evanescent ergosurface but no event horizon exhibits a linear instability of a peculiar kind: either there are solutions to the linear wave equation which concentrate a finite amount of energy into an arbitrarily small spatial region, or the energy of waves measured by a stationary family of observers can be amplified by an arbitrarily large amount. In certain circumstances we can rule out th","authors_text":"Joseph Keir","cross_cats":["hep-th","math-ph","math.AP","math.DG","math.MP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-10-06T17:11:15Z","title":"Evanescent ergosurface instability"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.03026","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:08a4e167b87019e864a8440c2b34d819d458f4e6bc03f63cfef644dbfdc9f977","target":"record","created_at":"2026-07-05T01:35:22Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"e2e55f601a2cab2f32d91cf2ec3e21147102d4d00de70a6272b1b7a9bc4f780d","cross_cats_sorted":["hep-th","math-ph","math.AP","math.DG","math.MP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-10-06T17:11:15Z","title_canon_sha256":"f55de56fff64a03d8a4ed47efa3f01be7b9abbfe6871543eccacf24a66c9de9e"},"schema_version":"1.0","source":{"id":"1810.03026","kind":"arxiv","version":2}},"canonical_sha256":"6f3973ef3e550d8727fb82928b1ef151b0f7ac88326ae0b12c84f9275d08cc52","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6f3973ef3e550d8727fb82928b1ef151b0f7ac88326ae0b12c84f9275d08cc52","first_computed_at":"2026-07-05T01:35:22.641794Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:35:22.641794Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LuE2ypfK/WQT8boynqBPMSA20G8oUDRNJZzOhTOtdyAdVSOw5iGNGIOX1siiJZEgwALO9usE1+NKe2dO3rJ6Dg==","signature_status":"signed_v1","signed_at":"2026-07-05T01:35:22.642302Z","signed_message":"canonical_sha256_bytes"},"source_id":"1810.03026","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:08a4e167b87019e864a8440c2b34d819d458f4e6bc03f63cfef644dbfdc9f977","sha256:34560b9e1c6e07fff76fc08e8ee4b8d7a391714cf25a5b2f8bf7b4e55fb1c9d8"],"state_sha256":"a2ae59f62382027df28c88d96b3a864baaab6ff25263b7476202b7e6c263620b"}