{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:2XS4VWWJNZZKBSIYX43Y6Y4J5G","short_pith_number":"pith:2XS4VWWJ","canonical_record":{"source":{"id":"0801.0905","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"gr-qc","submitted_at":"2008-01-07T05:34:48Z","cross_cats_sorted":[],"title_canon_sha256":"57c7c4bacb19206e0aab8bf141c9cad100c688b333fc5756f01ce4add7821a6f","abstract_canon_sha256":"2ccf422863887942466e4d049f43ca9f46980176f9261a5f1870d92234e2f7d0"},"schema_version":"1.0"},"canonical_sha256":"d5e5cadac96e72a0c918bf378f6389e984bae41157b920bb8d5cb1e2a79ba6c9","source":{"kind":"arxiv","id":"0801.0905","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0801.0905","created_at":"2026-05-18T04:18:13Z"},{"alias_kind":"arxiv_version","alias_value":"0801.0905v1","created_at":"2026-05-18T04:18:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0801.0905","created_at":"2026-05-18T04:18:13Z"},{"alias_kind":"pith_short_12","alias_value":"2XS4VWWJNZZK","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_16","alias_value":"2XS4VWWJNZZKBSIY","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_8","alias_value":"2XS4VWWJ","created_at":"2026-05-18T12:25:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:2XS4VWWJNZZKBSIYX43Y6Y4J5G","target":"record","payload":{"canonical_record":{"source":{"id":"0801.0905","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"gr-qc","submitted_at":"2008-01-07T05:34:48Z","cross_cats_sorted":[],"title_canon_sha256":"57c7c4bacb19206e0aab8bf141c9cad100c688b333fc5756f01ce4add7821a6f","abstract_canon_sha256":"2ccf422863887942466e4d049f43ca9f46980176f9261a5f1870d92234e2f7d0"},"schema_version":"1.0"},"canonical_sha256":"d5e5cadac96e72a0c918bf378f6389e984bae41157b920bb8d5cb1e2a79ba6c9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:18:13.510184Z","signature_b64":"RoJm7oKh8SeRf8XQKkgzxw+b0Zzf0EZ9IKBVX9aCxRDMY3RlmmS0H+iGuxT4ocS5nN+SC+uh3SFzP5AAmHTgAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d5e5cadac96e72a0c918bf378f6389e984bae41157b920bb8d5cb1e2a79ba6c9","last_reissued_at":"2026-05-18T04:18:13.509537Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:18:13.509537Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0801.0905","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":"2026-05-18T04:18:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7zYh3Ds/8S5TAlUQMWL2ipPqerihaNETSmvM1je7/pFx864dnfGOJakdg8CRmcLcfT+Pw5P+RcvL0EKQ1D5yAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T08:03:50.866870Z"},"content_sha256":"4ec816bcac18c4ded8c9560b94a3378b0050d8f203bf594a89b29fff486153bb","schema_version":"1.0","event_id":"sha256:4ec816bcac18c4ded8c9560b94a3378b0050d8f203bf594a89b29fff486153bb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:2XS4VWWJNZZKBSIYX43Y6Y4J5G","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Cosmological Solutions with Torsion in a Model of de Sitter Gauge Theory of Gravity","license":"","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Chao-Guang Huang, Hai-Qing Zhang, Han-Ying Guo","submitted_at":"2008-01-07T05:34:48Z","abstract_excerpt":"The torsion is shown to be vitally important in the explanation of the evolution of the universe in a large class of gravitational theories containing quadratic terms of curvature and torsion. The cosmological solutions with homogeneous and isotropic torsion in a model of de Sitter gauge theory of gravity are presented, which may explain the observation data for SN Ia when parameters are suitably chosen and supply a natural transit from decelerating expansion to accelerating expansion without the help of the introduction of other strange fields in the theory."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0801.0905","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":"2026-05-18T04:18:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5hwgKhILywmVolhqjXSmsfV7/Mz1vpSBTQ6pkJv1PJx+hw+qXcRGjFF1UwCjQxXmliuy6MEkBKAvNru0fqxVDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T08:03:50.867652Z"},"content_sha256":"f9e32316f10e113e4f354362f6e550551004669ee9a5673e7e797a699e38cea5","schema_version":"1.0","event_id":"sha256:f9e32316f10e113e4f354362f6e550551004669ee9a5673e7e797a699e38cea5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2XS4VWWJNZZKBSIYX43Y6Y4J5G/bundle.json","state_url":"https://pith.science/pith/2XS4VWWJNZZKBSIYX43Y6Y4J5G/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2XS4VWWJNZZKBSIYX43Y6Y4J5G/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":"2026-06-11T08:03:50Z","links":{"resolver":"https://pith.science/pith/2XS4VWWJNZZKBSIYX43Y6Y4J5G","bundle":"https://pith.science/pith/2XS4VWWJNZZKBSIYX43Y6Y4J5G/bundle.json","state":"https://pith.science/pith/2XS4VWWJNZZKBSIYX43Y6Y4J5G/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2XS4VWWJNZZKBSIYX43Y6Y4J5G/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:2XS4VWWJNZZKBSIYX43Y6Y4J5G","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":"2ccf422863887942466e4d049f43ca9f46980176f9261a5f1870d92234e2f7d0","cross_cats_sorted":[],"license":"","primary_cat":"gr-qc","submitted_at":"2008-01-07T05:34:48Z","title_canon_sha256":"57c7c4bacb19206e0aab8bf141c9cad100c688b333fc5756f01ce4add7821a6f"},"schema_version":"1.0","source":{"id":"0801.0905","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0801.0905","created_at":"2026-05-18T04:18:13Z"},{"alias_kind":"arxiv_version","alias_value":"0801.0905v1","created_at":"2026-05-18T04:18:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0801.0905","created_at":"2026-05-18T04:18:13Z"},{"alias_kind":"pith_short_12","alias_value":"2XS4VWWJNZZK","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_16","alias_value":"2XS4VWWJNZZKBSIY","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_8","alias_value":"2XS4VWWJ","created_at":"2026-05-18T12:25:56Z"}],"graph_snapshots":[{"event_id":"sha256:f9e32316f10e113e4f354362f6e550551004669ee9a5673e7e797a699e38cea5","target":"graph","created_at":"2026-05-18T04:18:13Z","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":"The torsion is shown to be vitally important in the explanation of the evolution of the universe in a large class of gravitational theories containing quadratic terms of curvature and torsion. The cosmological solutions with homogeneous and isotropic torsion in a model of de Sitter gauge theory of gravity are presented, which may explain the observation data for SN Ia when parameters are suitably chosen and supply a natural transit from decelerating expansion to accelerating expansion without the help of the introduction of other strange fields in the theory.","authors_text":"Chao-Guang Huang, Hai-Qing Zhang, Han-Ying Guo","cross_cats":[],"headline":"","license":"","primary_cat":"gr-qc","submitted_at":"2008-01-07T05:34:48Z","title":"Cosmological Solutions with Torsion in a Model of de Sitter Gauge Theory of Gravity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0801.0905","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":"sha256:4ec816bcac18c4ded8c9560b94a3378b0050d8f203bf594a89b29fff486153bb","target":"record","created_at":"2026-05-18T04:18:13Z","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":"2ccf422863887942466e4d049f43ca9f46980176f9261a5f1870d92234e2f7d0","cross_cats_sorted":[],"license":"","primary_cat":"gr-qc","submitted_at":"2008-01-07T05:34:48Z","title_canon_sha256":"57c7c4bacb19206e0aab8bf141c9cad100c688b333fc5756f01ce4add7821a6f"},"schema_version":"1.0","source":{"id":"0801.0905","kind":"arxiv","version":1}},"canonical_sha256":"d5e5cadac96e72a0c918bf378f6389e984bae41157b920bb8d5cb1e2a79ba6c9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d5e5cadac96e72a0c918bf378f6389e984bae41157b920bb8d5cb1e2a79ba6c9","first_computed_at":"2026-05-18T04:18:13.509537Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:18:13.509537Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RoJm7oKh8SeRf8XQKkgzxw+b0Zzf0EZ9IKBVX9aCxRDMY3RlmmS0H+iGuxT4ocS5nN+SC+uh3SFzP5AAmHTgAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:18:13.510184Z","signed_message":"canonical_sha256_bytes"},"source_id":"0801.0905","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4ec816bcac18c4ded8c9560b94a3378b0050d8f203bf594a89b29fff486153bb","sha256:f9e32316f10e113e4f354362f6e550551004669ee9a5673e7e797a699e38cea5"],"state_sha256":"669ecdb9d21b2c79dadbd9dac70d16e6a97dff44ff598b0f650517e6380d297a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NnDmdig2Pyvi1sKBK5/RglzRWHEAydSv30GEjoVwqSfOzq5xjN8TZV4gH5Lm0zBIQhklKvV0LsgJygGiprwmBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T08:03:50.871912Z","bundle_sha256":"ba9734f3403f7f771e6f8854d67616f7600b6c05877eee7752b63155a6c75343"}}