{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:UCHU4D3HU3PVDKTOPKPVPLLHWV","short_pith_number":"pith:UCHU4D3H","canonical_record":{"source":{"id":"1205.1542","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2012-05-07T20:55:21Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"980cbb811d06876da12b16db63c69753fbc86d549bd77ecc9c48914a94765c8e","abstract_canon_sha256":"e5b1208b61be5efcb2b9a9de494cd926ab94829aafcb5b4a200ac7ce45e7e803"},"schema_version":"1.0"},"canonical_sha256":"a08f4e0f67a6df51aa6e7a9f57ad67b54470ae2849f912559a71d04b757614f8","source":{"kind":"arxiv","id":"1205.1542","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1205.1542","created_at":"2026-05-18T03:27:32Z"},{"alias_kind":"arxiv_version","alias_value":"1205.1542v2","created_at":"2026-05-18T03:27:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1205.1542","created_at":"2026-05-18T03:27:32Z"},{"alias_kind":"pith_short_12","alias_value":"UCHU4D3HU3PV","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_16","alias_value":"UCHU4D3HU3PVDKTO","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_8","alias_value":"UCHU4D3H","created_at":"2026-05-18T12:27:23Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:UCHU4D3HU3PVDKTOPKPVPLLHWV","target":"record","payload":{"canonical_record":{"source":{"id":"1205.1542","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2012-05-07T20:55:21Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"980cbb811d06876da12b16db63c69753fbc86d549bd77ecc9c48914a94765c8e","abstract_canon_sha256":"e5b1208b61be5efcb2b9a9de494cd926ab94829aafcb5b4a200ac7ce45e7e803"},"schema_version":"1.0"},"canonical_sha256":"a08f4e0f67a6df51aa6e7a9f57ad67b54470ae2849f912559a71d04b757614f8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:27:32.900449Z","signature_b64":"unRnC/efQ0vdmb8efGPO9VRqEL3D6jhXJimN9QM/vLg8yul+8op3kUgdi3ZrylkxY8C4WEJqASwlTXBWh0lrAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a08f4e0f67a6df51aa6e7a9f57ad67b54470ae2849f912559a71d04b757614f8","last_reissued_at":"2026-05-18T03:27:32.900042Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:27:32.900042Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1205.1542","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:27:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Tfhn0Fmfa+BZAb5Pu3WD3Grn7I4WiflA16pJKjHqmXp6Zx1fceKXMvfE9gawIYeq1YI5AJqNzif/ub6MDUdLAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T12:53:33.199664Z"},"content_sha256":"2fc636fe3983eeb6b1960f2f1cc29a4dfc0bd064c844f615ef41e491148792f2","schema_version":"1.0","event_id":"sha256:2fc636fe3983eeb6b1960f2f1cc29a4dfc0bd064c844f615ef41e491148792f2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:UCHU4D3HU3PVDKTOPKPVPLLHWV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Nonsingular Chaplygin gas cosmologies in universes connected by wormhole","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"gr-qc","authors_text":"Anna Mokeeva, Vladimir Popov","submitted_at":"2012-05-07T20:55:21Z","abstract_excerpt":"We present some exact solutions of the Einstein equations with an anisotropic fluid exploiting the Chaplygin equation of state. The solutions describe spacetimes with two identical T regions and an intermediate static spherically symmetric R region containing a wormhole. The metric in the T region represents an anisotropic Kantowski-Sachs cosmological model. Its evolution starts from an event horizon and develops according to different scenarios including eternal expansion, contraction and also a finite universe lifetime."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1205.1542","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:27:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Phx5i1eIeZ6V55/7fE/NuwIz8Ivybym0RQ69S6oNpkNGfJv8XwA4mNQOOoDjDuayo53wFFvVyXnFF33QOE5eBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T12:53:33.200014Z"},"content_sha256":"62681615e464e97f7d2e8e715079d5f7189744e2c5c79ecc4b78f3cca8bfe2cc","schema_version":"1.0","event_id":"sha256:62681615e464e97f7d2e8e715079d5f7189744e2c5c79ecc4b78f3cca8bfe2cc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UCHU4D3HU3PVDKTOPKPVPLLHWV/bundle.json","state_url":"https://pith.science/pith/UCHU4D3HU3PVDKTOPKPVPLLHWV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UCHU4D3HU3PVDKTOPKPVPLLHWV/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-11T12:53:33Z","links":{"resolver":"https://pith.science/pith/UCHU4D3HU3PVDKTOPKPVPLLHWV","bundle":"https://pith.science/pith/UCHU4D3HU3PVDKTOPKPVPLLHWV/bundle.json","state":"https://pith.science/pith/UCHU4D3HU3PVDKTOPKPVPLLHWV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UCHU4D3HU3PVDKTOPKPVPLLHWV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:UCHU4D3HU3PVDKTOPKPVPLLHWV","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":"e5b1208b61be5efcb2b9a9de494cd926ab94829aafcb5b4a200ac7ce45e7e803","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2012-05-07T20:55:21Z","title_canon_sha256":"980cbb811d06876da12b16db63c69753fbc86d549bd77ecc9c48914a94765c8e"},"schema_version":"1.0","source":{"id":"1205.1542","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1205.1542","created_at":"2026-05-18T03:27:32Z"},{"alias_kind":"arxiv_version","alias_value":"1205.1542v2","created_at":"2026-05-18T03:27:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1205.1542","created_at":"2026-05-18T03:27:32Z"},{"alias_kind":"pith_short_12","alias_value":"UCHU4D3HU3PV","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_16","alias_value":"UCHU4D3HU3PVDKTO","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_8","alias_value":"UCHU4D3H","created_at":"2026-05-18T12:27:23Z"}],"graph_snapshots":[{"event_id":"sha256:62681615e464e97f7d2e8e715079d5f7189744e2c5c79ecc4b78f3cca8bfe2cc","target":"graph","created_at":"2026-05-18T03:27:32Z","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 present some exact solutions of the Einstein equations with an anisotropic fluid exploiting the Chaplygin equation of state. The solutions describe spacetimes with two identical T regions and an intermediate static spherically symmetric R region containing a wormhole. The metric in the T region represents an anisotropic Kantowski-Sachs cosmological model. Its evolution starts from an event horizon and develops according to different scenarios including eternal expansion, contraction and also a finite universe lifetime.","authors_text":"Anna Mokeeva, Vladimir Popov","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2012-05-07T20:55:21Z","title":"Nonsingular Chaplygin gas cosmologies in universes connected by wormhole"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1205.1542","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":"sha256:2fc636fe3983eeb6b1960f2f1cc29a4dfc0bd064c844f615ef41e491148792f2","target":"record","created_at":"2026-05-18T03:27:32Z","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":"e5b1208b61be5efcb2b9a9de494cd926ab94829aafcb5b4a200ac7ce45e7e803","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2012-05-07T20:55:21Z","title_canon_sha256":"980cbb811d06876da12b16db63c69753fbc86d549bd77ecc9c48914a94765c8e"},"schema_version":"1.0","source":{"id":"1205.1542","kind":"arxiv","version":2}},"canonical_sha256":"a08f4e0f67a6df51aa6e7a9f57ad67b54470ae2849f912559a71d04b757614f8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a08f4e0f67a6df51aa6e7a9f57ad67b54470ae2849f912559a71d04b757614f8","first_computed_at":"2026-05-18T03:27:32.900042Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:27:32.900042Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"unRnC/efQ0vdmb8efGPO9VRqEL3D6jhXJimN9QM/vLg8yul+8op3kUgdi3ZrylkxY8C4WEJqASwlTXBWh0lrAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:27:32.900449Z","signed_message":"canonical_sha256_bytes"},"source_id":"1205.1542","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2fc636fe3983eeb6b1960f2f1cc29a4dfc0bd064c844f615ef41e491148792f2","sha256:62681615e464e97f7d2e8e715079d5f7189744e2c5c79ecc4b78f3cca8bfe2cc"],"state_sha256":"b6b43d5017ee0b0a243aa454387c23988ead560e5201ba15c56f918239b67f6f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zjE90lBxsMjqVZjW6eY83oqM+OP7PR3cf1RfNYpLNBth/eKOW4BqJUoBzn9XZ11+JKgEqlOIJgsPENLZihvHDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T12:53:33.201914Z","bundle_sha256":"9bbeacfe011d3de0cc32cb4d611b90cecf4124a417cf3b428c54d25b80e57836"}}