{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:LM4WNA26D5OYMZJXBZSFTD3RFI","short_pith_number":"pith:LM4WNA26","canonical_record":{"source":{"id":"0905.3131","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-05-19T15:15:21Z","cross_cats_sorted":["gr-qc","hep-th"],"title_canon_sha256":"cd4b9636b119cee1f2bdb44730765f08653bac71007a7cf1ed1d4bbdd64ddfe4","abstract_canon_sha256":"fd54456fbf3c10489728b462dbab0d355716e900290e47b73ff3b2d3ec598bac"},"schema_version":"1.0"},"canonical_sha256":"5b3966835e1f5d8665370e64598f712a2a5e9b403ad47748a3c5767572f35f4d","source":{"kind":"arxiv","id":"0905.3131","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0905.3131","created_at":"2026-05-18T04:23:35Z"},{"alias_kind":"arxiv_version","alias_value":"0905.3131v1","created_at":"2026-05-18T04:23:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0905.3131","created_at":"2026-05-18T04:23:35Z"},{"alias_kind":"pith_short_12","alias_value":"LM4WNA26D5OY","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"LM4WNA26D5OYMZJX","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"LM4WNA26","created_at":"2026-05-18T12:26:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:LM4WNA26D5OYMZJXBZSFTD3RFI","target":"record","payload":{"canonical_record":{"source":{"id":"0905.3131","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-05-19T15:15:21Z","cross_cats_sorted":["gr-qc","hep-th"],"title_canon_sha256":"cd4b9636b119cee1f2bdb44730765f08653bac71007a7cf1ed1d4bbdd64ddfe4","abstract_canon_sha256":"fd54456fbf3c10489728b462dbab0d355716e900290e47b73ff3b2d3ec598bac"},"schema_version":"1.0"},"canonical_sha256":"5b3966835e1f5d8665370e64598f712a2a5e9b403ad47748a3c5767572f35f4d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:23:35.330466Z","signature_b64":"GdtXg2dA6Q/XvEo6SaQxYlwae15d6dLPLUKJ5D9/r0l+aRiO9U2qxioK24n2XUWhM7d8n7qBOlCcuEOt5VfWDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5b3966835e1f5d8665370e64598f712a2a5e9b403ad47748a3c5767572f35f4d","last_reissued_at":"2026-05-18T04:23:35.329748Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:23:35.329748Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0905.3131","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":"2026-05-18T04:23:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5CJvag5zCH+2WLDV3I8DnsqJyo3sY5Djwj0DP8nEXUM4hoM7hWuhYr05joYQNiobn+2BZfwC/GEoHpKIenjsAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T22:06:17.755854Z"},"content_sha256":"cc9e81f2b50bda39312149c1b16f9b45c77e4034eac53a35e6380d7b05bc3d86","schema_version":"1.0","event_id":"sha256:cc9e81f2b50bda39312149c1b16f9b45c77e4034eac53a35e6380d7b05bc3d86"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:LM4WNA26D5OYMZJXBZSFTD3RFI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On vacuum density, the initial singularity and dark energy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","hep-th"],"primary_cat":"astro-ph.CO","authors_text":"Reza Tavakol, Saulo Carneiro","submitted_at":"2009-05-19T15:15:21Z","abstract_excerpt":"Standard cosmology poses a number of important questions. Apart from its singular origin, it possesses early and late accelerating phases required to account for observations. The vacuum energy has been considered as a possible way to resolve some of these questions. The vacuum energy density induced by free fields in an early de Sitter phase has earlier been estimated to be proportional to $H^4$, while more recently it has been suggested that the QCD condensate induces a term proportional to H at late times. These results have been employed in models which are non-singular and inflationary at"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0905.3131","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":"2026-05-18T04:23:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JBhIvT+j17X4KKJiAs7GLR/A5Z4VzDHb1nUfhz4VPRaXQ2Vr19O10LMRZ1dWqGVzNIjlG8jnQ5i9oh6zspgDBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T22:06:17.756350Z"},"content_sha256":"c145e0c62fa8354ab255bc086233365ae249166f8b8e6835490ce3c326df879e","schema_version":"1.0","event_id":"sha256:c145e0c62fa8354ab255bc086233365ae249166f8b8e6835490ce3c326df879e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LM4WNA26D5OYMZJXBZSFTD3RFI/bundle.json","state_url":"https://pith.science/pith/LM4WNA26D5OYMZJXBZSFTD3RFI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LM4WNA26D5OYMZJXBZSFTD3RFI/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":"2026-05-25T22:06:17Z","links":{"resolver":"https://pith.science/pith/LM4WNA26D5OYMZJXBZSFTD3RFI","bundle":"https://pith.science/pith/LM4WNA26D5OYMZJXBZSFTD3RFI/bundle.json","state":"https://pith.science/pith/LM4WNA26D5OYMZJXBZSFTD3RFI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LM4WNA26D5OYMZJXBZSFTD3RFI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:LM4WNA26D5OYMZJXBZSFTD3RFI","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":"fd54456fbf3c10489728b462dbab0d355716e900290e47b73ff3b2d3ec598bac","cross_cats_sorted":["gr-qc","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-05-19T15:15:21Z","title_canon_sha256":"cd4b9636b119cee1f2bdb44730765f08653bac71007a7cf1ed1d4bbdd64ddfe4"},"schema_version":"1.0","source":{"id":"0905.3131","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0905.3131","created_at":"2026-05-18T04:23:35Z"},{"alias_kind":"arxiv_version","alias_value":"0905.3131v1","created_at":"2026-05-18T04:23:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0905.3131","created_at":"2026-05-18T04:23:35Z"},{"alias_kind":"pith_short_12","alias_value":"LM4WNA26D5OY","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"LM4WNA26D5OYMZJX","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"LM4WNA26","created_at":"2026-05-18T12:26:00Z"}],"graph_snapshots":[{"event_id":"sha256:c145e0c62fa8354ab255bc086233365ae249166f8b8e6835490ce3c326df879e","target":"graph","created_at":"2026-05-18T04:23:35Z","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":"Standard cosmology poses a number of important questions. Apart from its singular origin, it possesses early and late accelerating phases required to account for observations. The vacuum energy has been considered as a possible way to resolve some of these questions. The vacuum energy density induced by free fields in an early de Sitter phase has earlier been estimated to be proportional to $H^4$, while more recently it has been suggested that the QCD condensate induces a term proportional to H at late times. These results have been employed in models which are non-singular and inflationary at","authors_text":"Reza Tavakol, Saulo Carneiro","cross_cats":["gr-qc","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-05-19T15:15:21Z","title":"On vacuum density, the initial singularity and dark energy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0905.3131","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:cc9e81f2b50bda39312149c1b16f9b45c77e4034eac53a35e6380d7b05bc3d86","target":"record","created_at":"2026-05-18T04:23:35Z","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":"fd54456fbf3c10489728b462dbab0d355716e900290e47b73ff3b2d3ec598bac","cross_cats_sorted":["gr-qc","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-05-19T15:15:21Z","title_canon_sha256":"cd4b9636b119cee1f2bdb44730765f08653bac71007a7cf1ed1d4bbdd64ddfe4"},"schema_version":"1.0","source":{"id":"0905.3131","kind":"arxiv","version":1}},"canonical_sha256":"5b3966835e1f5d8665370e64598f712a2a5e9b403ad47748a3c5767572f35f4d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5b3966835e1f5d8665370e64598f712a2a5e9b403ad47748a3c5767572f35f4d","first_computed_at":"2026-05-18T04:23:35.329748Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:23:35.329748Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GdtXg2dA6Q/XvEo6SaQxYlwae15d6dLPLUKJ5D9/r0l+aRiO9U2qxioK24n2XUWhM7d8n7qBOlCcuEOt5VfWDg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:23:35.330466Z","signed_message":"canonical_sha256_bytes"},"source_id":"0905.3131","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cc9e81f2b50bda39312149c1b16f9b45c77e4034eac53a35e6380d7b05bc3d86","sha256:c145e0c62fa8354ab255bc086233365ae249166f8b8e6835490ce3c326df879e"],"state_sha256":"e38be90f2e5ed3cf165c341640b0b7315ad942424c79202e98b40ee8fcf0afda"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XPAne5Q4j/hr/rSpFReeI2n5oEnH0UcoJHCAeLTUhst4QeTp96USqIRBX7cwRYUYV2xKWxeZrgJ93EfjC2pCBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T22:06:17.760065Z","bundle_sha256":"45f3f31d84a689be61a5f9dc8a35f33f668075f74931fb3772c844cb124d598a"}}