{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1998:XWS7PJDG7UVKAMDLYJDG4NKBXU","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":"32429ebcb5d00cf00c17e72455a1495bc16c8d43faeb0a60aae33db739466576","cross_cats_sorted":[],"license":"","primary_cat":"gr-qc","submitted_at":"1998-09-08T18:54:22Z","title_canon_sha256":"656443a9e597b219ddad2464328e3a14f80491509b3e1cd2331df11403ce72b5"},"schema_version":"1.0","source":{"id":"gr-qc/9809034","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"gr-qc/9809034","created_at":"2026-05-18T01:08:01Z"},{"alias_kind":"arxiv_version","alias_value":"gr-qc/9809034v2","created_at":"2026-05-18T01:08:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.gr-qc/9809034","created_at":"2026-05-18T01:08:01Z"},{"alias_kind":"pith_short_12","alias_value":"XWS7PJDG7UVK","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"XWS7PJDG7UVKAMDL","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"XWS7PJDG","created_at":"2026-05-18T12:25:49Z"}],"graph_snapshots":[{"event_id":"sha256:afbb93e7d9f185edb8c5f04f1e42389992d4278857d96cb11fb77505883f91d9","target":"graph","created_at":"2026-05-18T01:08:01Z","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"},"paper":{"abstract_excerpt":"We describe the null geometry of a multiple black hole event horizon in terms of a conformal rescaling of a flat space null hypersurface. For the prolate spheroidal case, we show that the method reproduces the pair-of-pants shaped horizon found in the numerical simulation of the head-on-collision of black holes. For the oblate case, it reproduces the initially toroidal event horizon found in the numerical simulation of collapse of a rotating cluster. The analytic nature of the approach makes further conclusions possible, such as a bearing on the hoop conjecture. From a time reversed point of v","authors_text":"B\\'ela Szil\\'agyi, Jeffrey Winicour, Luis Lehner, Nigel T. Bishop, Roberto G\\'omez","cross_cats":[],"headline":"","license":"","primary_cat":"gr-qc","submitted_at":"1998-09-08T18:54:22Z","title":"Exact Solutions for the Intrinsic Geometry of Black Hole Coalescence"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"gr-qc/9809034","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":"sha256:3eace00cf3cfdffe53ab7688ae8e1ee13402a179c6c2f9f9f4441f28ca6349b6","target":"record","created_at":"2026-05-18T01:08:01Z","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":"32429ebcb5d00cf00c17e72455a1495bc16c8d43faeb0a60aae33db739466576","cross_cats_sorted":[],"license":"","primary_cat":"gr-qc","submitted_at":"1998-09-08T18:54:22Z","title_canon_sha256":"656443a9e597b219ddad2464328e3a14f80491509b3e1cd2331df11403ce72b5"},"schema_version":"1.0","source":{"id":"gr-qc/9809034","kind":"arxiv","version":2}},"canonical_sha256":"bda5f7a466fd2aa0306bc2466e3541bd0fafcee9e81c4c5af44d5c9818b3901b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bda5f7a466fd2aa0306bc2466e3541bd0fafcee9e81c4c5af44d5c9818b3901b","first_computed_at":"2026-05-18T01:08:01.210079Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:08:01.210079Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ot25uF940bAJVsBicytVSE+kFzY7rrQv1FkXWjj/EMP86r7w/TKEf6HKldTVnXc1Fl/vmfxM39ihqP1qwkJBAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:08:01.210708Z","signed_message":"canonical_sha256_bytes"},"source_id":"gr-qc/9809034","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3eace00cf3cfdffe53ab7688ae8e1ee13402a179c6c2f9f9f4441f28ca6349b6","sha256:afbb93e7d9f185edb8c5f04f1e42389992d4278857d96cb11fb77505883f91d9"],"state_sha256":"ae114ad825f3aff4fe6cf45e7a6cb96b39dba949c53384a1cf12a6a53d61d12b"}