{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:SAAFM4OUHZC3LPWSAXHLQJ3Z7G","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":"8cca0c32c81f7e1586bae4b026d93b2a0bfb176110b0566e8664829a1e86323a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2020-09-25T07:01:34Z","title_canon_sha256":"bc0e5e3056858ba9ebce502e9c936b5fd6bb4ad6e32f44ba77780bcaa38e3e7a"},"schema_version":"1.0","source":{"id":"2009.12057","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2009.12057","created_at":"2026-07-05T02:37:29Z"},{"alias_kind":"arxiv_version","alias_value":"2009.12057v3","created_at":"2026-07-05T02:37:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.12057","created_at":"2026-07-05T02:37:29Z"},{"alias_kind":"pith_short_12","alias_value":"SAAFM4OUHZC3","created_at":"2026-07-05T02:37:29Z"},{"alias_kind":"pith_short_16","alias_value":"SAAFM4OUHZC3LPWS","created_at":"2026-07-05T02:37:29Z"},{"alias_kind":"pith_short_8","alias_value":"SAAFM4OU","created_at":"2026-07-05T02:37:29Z"}],"graph_snapshots":[{"event_id":"sha256:71ad2eec6d18851b8448d7256a710d2a9b9ed33f0040177004e4cc799772e589","target":"graph","created_at":"2026-07-05T02:37:29Z","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/2009.12057/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We develop a number of novel \"black-bounce\" spacetimes. These are specific regular black holes where the \"area radius\" always remains non-zero, thereby leading to a \"throat\" that is either timelike (corresponding to a traversable wormhole), spacelike (corresponding to a \"bounce\" into a future universe), or null (corresponding to a \"one-way wormhole\"). We shall first perform a general analysis of the regularity conditions for such a spacetime, and then consider a number of specific examples. The examples are constructed using a mass function similar to that of Fan--Wang, and fall into several p","authors_text":"Alex Simpson, Francisco S. N. Lobo, Manuel E. Rodrigues, Marcos V. de S. Silva, Matt Visser","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2020-09-25T07:01:34Z","title":"Novel black-bounce spacetimes: wormholes, regularity, energy conditions, and causal structure"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.12057","kind":"arxiv","version":3},"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:e9bf57c96dbab13affa66252794e3a578385c231cfcae718b896a2b0fece276d","target":"record","created_at":"2026-07-05T02:37:29Z","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":"8cca0c32c81f7e1586bae4b026d93b2a0bfb176110b0566e8664829a1e86323a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2020-09-25T07:01:34Z","title_canon_sha256":"bc0e5e3056858ba9ebce502e9c936b5fd6bb4ad6e32f44ba77780bcaa38e3e7a"},"schema_version":"1.0","source":{"id":"2009.12057","kind":"arxiv","version":3}},"canonical_sha256":"90005671d43e45b5bed205ceb82779f9afb92fd1245107ad7c63743a6b6e09ea","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"90005671d43e45b5bed205ceb82779f9afb92fd1245107ad7c63743a6b6e09ea","first_computed_at":"2026-07-05T02:37:29.833657Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:37:29.833657Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3NN59o/mTveyHjc9ENaicZW7DP4R9Cl7IZH7PK1wFROf0sD0DXB56FBStAkefO3X8J9sBenvHbNQXWCV/5o0Dw==","signature_status":"signed_v1","signed_at":"2026-07-05T02:37:29.834141Z","signed_message":"canonical_sha256_bytes"},"source_id":"2009.12057","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e9bf57c96dbab13affa66252794e3a578385c231cfcae718b896a2b0fece276d","sha256:71ad2eec6d18851b8448d7256a710d2a9b9ed33f0040177004e4cc799772e589"],"state_sha256":"ca501f891e930295bfa6e69a65bfb9b9df167a76f6b8a3839e1db028ebc1251f"}