{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2026:QYAPIJGNQQ7KLBEVK4CVJY3PEV","short_pith_number":"pith:QYAPIJGN","schema_version":"1.0","canonical_sha256":"8600f424cd843ea58495570554e36f257cc7d0ce81af32b2e4a98735ab385524","source":{"kind":"arxiv","id":"2608.08711","version":1},"attestation_state":"computed","paper":{"title":"Completing the Penrose Process without a Horizon","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Bin Chen, Minyong Guo, Shiyang Hu, Yang Huang","submitted_at":"2026-08-09T13:54:10Z","abstract_excerpt":"In its standard black-hole realization, the Penrose process uses an event horizon to remove a negative-energy fragment. We show that, at the kinematic level, horizon absorption can instead be replaced by confinement within a compact ergoregion, without imposing an absorbing or reflecting inner boundary. For a broad class of regular, stationary, axisymmetric, asymptotically flat horizonless spacetimes, we prove that every smooth connected component of the spatial ergosurface is a compact torus, independently of the field equations and matter content. Future-directed geodesics with negative Kill"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2608.08711","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2026-08-09T13:54:10Z","cross_cats_sorted":[],"title_canon_sha256":"cfe010f54b9e1e8174688c15c55279bf73f8ee481e7877c4647350c1b820826e","abstract_canon_sha256":"827e89facb66ff26589d042deee930119bc63070a3784616af59cddd004fe769"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-08-11T01:25:06.989656Z","signature_b64":"gzKQO3Or4+Dh2vr5WEGIBXQP/XzqZ7vtu/LsH39rUKn+Bf1l8pT6K3rHGX4HyBsJjHzcaOakedlw6yNBvn9wAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8600f424cd843ea58495570554e36f257cc7d0ce81af32b2e4a98735ab385524","last_reissued_at":"2026-08-11T01:25:06.987250Z","signature_status":"signed_v1","first_computed_at":"2026-08-11T01:25:06.987250Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Completing the Penrose Process without a Horizon","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Bin Chen, Minyong Guo, Shiyang Hu, Yang Huang","submitted_at":"2026-08-09T13:54:10Z","abstract_excerpt":"In its standard black-hole realization, the Penrose process uses an event horizon to remove a negative-energy fragment. We show that, at the kinematic level, horizon absorption can instead be replaced by confinement within a compact ergoregion, without imposing an absorbing or reflecting inner boundary. For a broad class of regular, stationary, axisymmetric, asymptotically flat horizonless spacetimes, we prove that every smooth connected component of the spatial ergosurface is a compact torus, independently of the field equations and matter content. Future-directed geodesics with negative Kill"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.08711","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2608.08711/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2608.08711","created_at":"2026-08-11T01:25:06.988054+00:00"},{"alias_kind":"arxiv_version","alias_value":"2608.08711v1","created_at":"2026-08-11T01:25:06.988054+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.08711","created_at":"2026-08-11T01:25:06.988054+00:00"},{"alias_kind":"pith_short_12","alias_value":"QYAPIJGNQQ7K","created_at":"2026-08-11T01:25:06.988054+00:00"},{"alias_kind":"pith_short_16","alias_value":"QYAPIJGNQQ7KLBEV","created_at":"2026-08-11T01:25:06.988054+00:00"},{"alias_kind":"pith_short_8","alias_value":"QYAPIJGN","created_at":"2026-08-11T01:25:06.988054+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/QYAPIJGNQQ7KLBEVK4CVJY3PEV","json":"https://pith.science/pith/QYAPIJGNQQ7KLBEVK4CVJY3PEV.json","graph_json":"https://pith.science/api/pith-number/QYAPIJGNQQ7KLBEVK4CVJY3PEV/graph.json","events_json":"https://pith.science/api/pith-number/QYAPIJGNQQ7KLBEVK4CVJY3PEV/events.json","paper":"https://pith.science/paper/QYAPIJGN"},"agent_actions":{"view_html":"https://pith.science/pith/QYAPIJGNQQ7KLBEVK4CVJY3PEV","download_json":"https://pith.science/pith/QYAPIJGNQQ7KLBEVK4CVJY3PEV.json","view_paper":"https://pith.science/paper/QYAPIJGN","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2608.08711&json=true","fetch_graph":"https://pith.science/api/pith-number/QYAPIJGNQQ7KLBEVK4CVJY3PEV/graph.json","fetch_events":"https://pith.science/api/pith-number/QYAPIJGNQQ7KLBEVK4CVJY3PEV/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/QYAPIJGNQQ7KLBEVK4CVJY3PEV/action/timestamp_anchor","attest_storage":"https://pith.science/pith/QYAPIJGNQQ7KLBEVK4CVJY3PEV/action/storage_attestation","attest_author":"https://pith.science/pith/QYAPIJGNQQ7KLBEVK4CVJY3PEV/action/author_attestation","sign_citation":"https://pith.science/pith/QYAPIJGNQQ7KLBEVK4CVJY3PEV/action/citation_signature","submit_replication":"https://pith.science/pith/QYAPIJGNQQ7KLBEVK4CVJY3PEV/action/replication_record"}},"created_at":"2026-08-11T01:25:06.988054+00:00","updated_at":"2026-08-11T01:25:06.988054+00:00"}