{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:M5BJEYUVF3FR25N5VEXLP7OYB2","short_pith_number":"pith:M5BJEYUV","canonical_record":{"source":{"id":"1404.1887","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2014-04-07T19:06:46Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"1be59e97af4e8858a2af855c958411904da7087c47561b582c874b0f2be528c9","abstract_canon_sha256":"349e03bdc6c4436f3426e749db6e2bcc243adfd4a5aa03224382708eb07a6c6b"},"schema_version":"1.0"},"canonical_sha256":"67429262952ecb1d75bda92eb7fdd80ea3ebcc0133a2abc0246886026ea82044","source":{"kind":"arxiv","id":"1404.1887","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1404.1887","created_at":"2026-05-18T02:52:33Z"},{"alias_kind":"arxiv_version","alias_value":"1404.1887v1","created_at":"2026-05-18T02:52:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1404.1887","created_at":"2026-05-18T02:52:33Z"},{"alias_kind":"pith_short_12","alias_value":"M5BJEYUVF3FR","created_at":"2026-05-18T12:28:38Z"},{"alias_kind":"pith_short_16","alias_value":"M5BJEYUVF3FR25N5","created_at":"2026-05-18T12:28:38Z"},{"alias_kind":"pith_short_8","alias_value":"M5BJEYUV","created_at":"2026-05-18T12:28:38Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:M5BJEYUVF3FR25N5VEXLP7OYB2","target":"record","payload":{"canonical_record":{"source":{"id":"1404.1887","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2014-04-07T19:06:46Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"1be59e97af4e8858a2af855c958411904da7087c47561b582c874b0f2be528c9","abstract_canon_sha256":"349e03bdc6c4436f3426e749db6e2bcc243adfd4a5aa03224382708eb07a6c6b"},"schema_version":"1.0"},"canonical_sha256":"67429262952ecb1d75bda92eb7fdd80ea3ebcc0133a2abc0246886026ea82044","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:52:33.706569Z","signature_b64":"TPizytAfnEpqOqhCq0m9Yl074udI2WS7yGCT6Vxk1AK2EXY3pQMC51VqHUNjNH3sSud3VjfN0myJe6b6j8RkBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"67429262952ecb1d75bda92eb7fdd80ea3ebcc0133a2abc0246886026ea82044","last_reissued_at":"2026-05-18T02:52:33.705808Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:52:33.705808Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1404.1887","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:52:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kRHpSz+CC4WJ2XPl++k0u0GBeihJnaT+/BHFIYdT4SH7H4i+JFosPDdvPvP+Q/811hZFStkw8YVH8fG0iRC3Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T11:00:42.336582Z"},"content_sha256":"da4513f2424031866410abc2c60dc572606ba0de462e0267cd57212cad670ef7","schema_version":"1.0","event_id":"sha256:da4513f2424031866410abc2c60dc572606ba0de462e0267cd57212cad670ef7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:M5BJEYUVF3FR25N5VEXLP7OYB2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Bounce Universe Induced by an Inhomogeneous Dark Fluid Coupled with Dark Matter","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"gr-qc","authors_text":"A. V. Timoshkin, I. Brevik, V. V. Obukhov","submitted_at":"2014-04-07T19:06:46Z","abstract_excerpt":"We investigate cosmological models with a linear inhomogeneous time-dependent equation of state for the dark energy, coupled with dark matter, leading to a bounce cosmology. Equivalent descriptions in terms of the equation-of-state parameters for an exponential, a power-law, or a double exponential form of the scale factor $a$ is obtained. The stability of the solutions is explored, by considering small perturbations around the critical points for the bounce in the early and in the late-time universe."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.1887","kind":"arxiv","version":1},"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":"2026-05-18T02:52:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"U6C2l9c3fqyBtXOXGIO7T/qZJQoopwh++YMTDjWYTsLH7rygZmVZFK+Fqnsdm7i6eptG3dnhkybss4vZCvSUCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T11:00:42.337266Z"},"content_sha256":"ecaa6b2829f54b45d5b39c6c48a08c4e9045616c56eeeeb7f2f1898d6e91416b","schema_version":"1.0","event_id":"sha256:ecaa6b2829f54b45d5b39c6c48a08c4e9045616c56eeeeb7f2f1898d6e91416b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/M5BJEYUVF3FR25N5VEXLP7OYB2/bundle.json","state_url":"https://pith.science/pith/M5BJEYUVF3FR25N5VEXLP7OYB2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/M5BJEYUVF3FR25N5VEXLP7OYB2/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":"2026-05-25T11:00:42Z","links":{"resolver":"https://pith.science/pith/M5BJEYUVF3FR25N5VEXLP7OYB2","bundle":"https://pith.science/pith/M5BJEYUVF3FR25N5VEXLP7OYB2/bundle.json","state":"https://pith.science/pith/M5BJEYUVF3FR25N5VEXLP7OYB2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/M5BJEYUVF3FR25N5VEXLP7OYB2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:M5BJEYUVF3FR25N5VEXLP7OYB2","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":"349e03bdc6c4436f3426e749db6e2bcc243adfd4a5aa03224382708eb07a6c6b","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2014-04-07T19:06:46Z","title_canon_sha256":"1be59e97af4e8858a2af855c958411904da7087c47561b582c874b0f2be528c9"},"schema_version":"1.0","source":{"id":"1404.1887","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1404.1887","created_at":"2026-05-18T02:52:33Z"},{"alias_kind":"arxiv_version","alias_value":"1404.1887v1","created_at":"2026-05-18T02:52:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1404.1887","created_at":"2026-05-18T02:52:33Z"},{"alias_kind":"pith_short_12","alias_value":"M5BJEYUVF3FR","created_at":"2026-05-18T12:28:38Z"},{"alias_kind":"pith_short_16","alias_value":"M5BJEYUVF3FR25N5","created_at":"2026-05-18T12:28:38Z"},{"alias_kind":"pith_short_8","alias_value":"M5BJEYUV","created_at":"2026-05-18T12:28:38Z"}],"graph_snapshots":[{"event_id":"sha256:ecaa6b2829f54b45d5b39c6c48a08c4e9045616c56eeeeb7f2f1898d6e91416b","target":"graph","created_at":"2026-05-18T02:52:33Z","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 investigate cosmological models with a linear inhomogeneous time-dependent equation of state for the dark energy, coupled with dark matter, leading to a bounce cosmology. Equivalent descriptions in terms of the equation-of-state parameters for an exponential, a power-law, or a double exponential form of the scale factor $a$ is obtained. The stability of the solutions is explored, by considering small perturbations around the critical points for the bounce in the early and in the late-time universe.","authors_text":"A. V. Timoshkin, I. Brevik, V. V. Obukhov","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2014-04-07T19:06:46Z","title":"Bounce Universe Induced by an Inhomogeneous Dark Fluid Coupled with Dark Matter"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.1887","kind":"arxiv","version":1},"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:da4513f2424031866410abc2c60dc572606ba0de462e0267cd57212cad670ef7","target":"record","created_at":"2026-05-18T02:52:33Z","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":"349e03bdc6c4436f3426e749db6e2bcc243adfd4a5aa03224382708eb07a6c6b","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2014-04-07T19:06:46Z","title_canon_sha256":"1be59e97af4e8858a2af855c958411904da7087c47561b582c874b0f2be528c9"},"schema_version":"1.0","source":{"id":"1404.1887","kind":"arxiv","version":1}},"canonical_sha256":"67429262952ecb1d75bda92eb7fdd80ea3ebcc0133a2abc0246886026ea82044","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"67429262952ecb1d75bda92eb7fdd80ea3ebcc0133a2abc0246886026ea82044","first_computed_at":"2026-05-18T02:52:33.705808Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:52:33.705808Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TPizytAfnEpqOqhCq0m9Yl074udI2WS7yGCT6Vxk1AK2EXY3pQMC51VqHUNjNH3sSud3VjfN0myJe6b6j8RkBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:52:33.706569Z","signed_message":"canonical_sha256_bytes"},"source_id":"1404.1887","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:da4513f2424031866410abc2c60dc572606ba0de462e0267cd57212cad670ef7","sha256:ecaa6b2829f54b45d5b39c6c48a08c4e9045616c56eeeeb7f2f1898d6e91416b"],"state_sha256":"89840d32d14b46f57064df3ba274c6889e1790d68d0c48983fcf60de0629f00d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KRkQTjaIlnr3zyFV6KrEfPUT9Kh4J/PCfbbUbnW7T6fq/zmiWEvzcFCnZtt25k/ttDI1B6AGyd5OnFZt5qnyAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T11:00:42.339971Z","bundle_sha256":"49539daea04c61b63787a4873496a7ec9f863e6250928795960f0156234384a8"}}