{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:KI6ZS5M45JGIATDA4WG44G3ADG","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":"d03c248371ae6c340da2447cdce6f6bd2f8c315ca931b41a0ad7761328bac374","cross_cats_sorted":["physics.optics","physics.pop-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2011-08-18T16:54:09Z","title_canon_sha256":"c2d179085b56b47d46acfe309b018534ea2d33fbc3b6b6511d58c3f195189597"},"schema_version":"1.0","source":{"id":"1108.3793","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1108.3793","created_at":"2026-05-18T03:42:11Z"},{"alias_kind":"arxiv_version","alias_value":"1108.3793v2","created_at":"2026-05-18T03:42:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1108.3793","created_at":"2026-05-18T03:42:11Z"},{"alias_kind":"pith_short_12","alias_value":"KI6ZS5M45JGI","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_16","alias_value":"KI6ZS5M45JGIATDA","created_at":"2026-05-18T12:26:32Z"},{"alias_kind":"pith_short_8","alias_value":"KI6ZS5M4","created_at":"2026-05-18T12:26:32Z"}],"graph_snapshots":[{"event_id":"sha256:d8213817cbe9fd1806cdacce9c59753cb57881a25a01ad002784bfacf2c1080f","target":"graph","created_at":"2026-05-18T03:42:11Z","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":"In light of the surge in popularity of electromagnetic cloaking devices, we consider whether it is possible to use gravitational lensing to cloak a volume of spacetime. A metric for such a spacetime geometry is presented, and its geometric and physical implications are explained.","authors_text":"Benjamin K. Tippett","cross_cats":["physics.optics","physics.pop-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2011-08-18T16:54:09Z","title":"Gravitational Lensing as a Mechanism For Effective Cloaking"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1108.3793","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":"sha256:36c036bbe54d6df94f450f560746fb141df63534e13c10393689c005ba5a4ad0","target":"record","created_at":"2026-05-18T03:42:11Z","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":"d03c248371ae6c340da2447cdce6f6bd2f8c315ca931b41a0ad7761328bac374","cross_cats_sorted":["physics.optics","physics.pop-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2011-08-18T16:54:09Z","title_canon_sha256":"c2d179085b56b47d46acfe309b018534ea2d33fbc3b6b6511d58c3f195189597"},"schema_version":"1.0","source":{"id":"1108.3793","kind":"arxiv","version":2}},"canonical_sha256":"523d99759cea4c804c60e58dce1b6019b67729a92dbd4d8ea0ce844694a4a7ca","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"523d99759cea4c804c60e58dce1b6019b67729a92dbd4d8ea0ce844694a4a7ca","first_computed_at":"2026-05-18T03:42:11.901094Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:42:11.901094Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"IOI6W65XqZGHNU7qchUQPLpmR1xYLWel6E84JCpyNYYlhqkD/jjH1Xc4uBaWlQMa+O1160r3hcZIrXiapBUGBw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:42:11.901780Z","signed_message":"canonical_sha256_bytes"},"source_id":"1108.3793","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:36c036bbe54d6df94f450f560746fb141df63534e13c10393689c005ba5a4ad0","sha256:d8213817cbe9fd1806cdacce9c59753cb57881a25a01ad002784bfacf2c1080f"],"state_sha256":"00e8344fd5dcd7d02d9f0fc52374db7c953bbce8428fb8e747a98f2ca3ee5d33"}