{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:BL446HPXSQVXNWMNIYVQWXKSMC","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":"3a511aec964718d6818a6f9c727915de48742c3e488829bdc9fd41e4d24f24cd","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2014-02-13T16:26:49Z","title_canon_sha256":"aeff84fcffbdb1271f6067bb19739847442db3a0e5575f579c41e3bc9f446a01"},"schema_version":"1.0","source":{"id":"1402.3201","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1402.3201","created_at":"2026-05-18T01:44:38Z"},{"alias_kind":"arxiv_version","alias_value":"1402.3201v2","created_at":"2026-05-18T01:44:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1402.3201","created_at":"2026-05-18T01:44:38Z"},{"alias_kind":"pith_short_12","alias_value":"BL446HPXSQVX","created_at":"2026-05-18T12:28:22Z"},{"alias_kind":"pith_short_16","alias_value":"BL446HPXSQVXNWMN","created_at":"2026-05-18T12:28:22Z"},{"alias_kind":"pith_short_8","alias_value":"BL446HPX","created_at":"2026-05-18T12:28:22Z"}],"graph_snapshots":[{"event_id":"sha256:5c50d18ac0dda455a53022d9d3e8845825b238d65f6ff4e2fc87f3efe0390ad4","target":"graph","created_at":"2026-05-18T01:44:38Z","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 consider a family of cosmological models in which all mass is confined to a regular lattice of identical black holes. By exploiting the reflection symmetry about planes that bisect these lattices into identical halves, we are able to consider the evolution of a number of geometrically distinguished surfaces that exist within each of them. We find that the evolution equations for the reflection symmetric surfaces can be written as a simple set of Friedmann-like equations, with source terms that behave like a set of interacting effective fluids. We then show that gravitational waves are effec","authors_text":"Daniele Gregoris, Kjell Rosquist, Timothy Clifton","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2014-02-13T16:26:49Z","title":"Piecewise Silence in Discrete Cosmological Models"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1402.3201","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":"sha256:7bc688ece8fdd8d3462fb8ddfd583b6ad157bb362e474ea79600965a2c09204c","target":"record","created_at":"2026-05-18T01:44:38Z","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":"3a511aec964718d6818a6f9c727915de48742c3e488829bdc9fd41e4d24f24cd","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2014-02-13T16:26:49Z","title_canon_sha256":"aeff84fcffbdb1271f6067bb19739847442db3a0e5575f579c41e3bc9f446a01"},"schema_version":"1.0","source":{"id":"1402.3201","kind":"arxiv","version":2}},"canonical_sha256":"0af9cf1df7942b76d98d462b0b5d5260b8cd1b15819fadfa4a610f09a17359e0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0af9cf1df7942b76d98d462b0b5d5260b8cd1b15819fadfa4a610f09a17359e0","first_computed_at":"2026-05-18T01:44:38.485271Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:44:38.485271Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ceoIPkWhKueyS8z4NVdTNrAJxMxe8b6aXeuLRYO5LdpdZGUdCj3YskbwhxmwC/h28LZVIahkUT/icIkdet5OAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:44:38.485932Z","signed_message":"canonical_sha256_bytes"},"source_id":"1402.3201","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7bc688ece8fdd8d3462fb8ddfd583b6ad157bb362e474ea79600965a2c09204c","sha256:5c50d18ac0dda455a53022d9d3e8845825b238d65f6ff4e2fc87f3efe0390ad4"],"state_sha256":"90abb96829468436cf3a3481d77e14bc6f82ad457b750e69f86355838c9b134c"}