{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:OCCFXSB2EQYW4IEBSOS46VZ67L","short_pith_number":"pith:OCCFXSB2","canonical_record":{"source":{"id":"1705.04931","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-05-14T08:55:42Z","cross_cats_sorted":[],"title_canon_sha256":"bcbf2eda52ae7e463a90cb19b7681ea1ddf06eda571fae503faf5b8ac4b52f3c","abstract_canon_sha256":"93b80fe49ad5bdd4f8d3a87231063859a92b981306a1b2eb20786b8fee44dc71"},"schema_version":"1.0"},"canonical_sha256":"70845bc83a24316e208193a5cf573efad540bf3f4edb8354dfb3ebedc85fddc3","source":{"kind":"arxiv","id":"1705.04931","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1705.04931","created_at":"2026-05-18T00:32:10Z"},{"alias_kind":"arxiv_version","alias_value":"1705.04931v2","created_at":"2026-05-18T00:32:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.04931","created_at":"2026-05-18T00:32:10Z"},{"alias_kind":"pith_short_12","alias_value":"OCCFXSB2EQYW","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_16","alias_value":"OCCFXSB2EQYW4IEB","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_8","alias_value":"OCCFXSB2","created_at":"2026-05-18T12:31:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:OCCFXSB2EQYW4IEBSOS46VZ67L","target":"record","payload":{"canonical_record":{"source":{"id":"1705.04931","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-05-14T08:55:42Z","cross_cats_sorted":[],"title_canon_sha256":"bcbf2eda52ae7e463a90cb19b7681ea1ddf06eda571fae503faf5b8ac4b52f3c","abstract_canon_sha256":"93b80fe49ad5bdd4f8d3a87231063859a92b981306a1b2eb20786b8fee44dc71"},"schema_version":"1.0"},"canonical_sha256":"70845bc83a24316e208193a5cf573efad540bf3f4edb8354dfb3ebedc85fddc3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:32:10.269484Z","signature_b64":"FnBxgFVmDPchFQaaMC6EElRv4XqVQWBqUVpKOhEyL9AsbZ53KVNI5J709/V1MMvMqVbmsLDJsU9SLMLIWTB4Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"70845bc83a24316e208193a5cf573efad540bf3f4edb8354dfb3ebedc85fddc3","last_reissued_at":"2026-05-18T00:32:10.268812Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:32:10.268812Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1705.04931","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":"2026-05-18T00:32:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WVeFK/AZTUPZM/21fOK8FgiwYNL3IYz+URQrPE9906IkIzgI4OkdasVz/n9DSiT1iM94NbPwD1ACrMmPWkycAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T19:53:41.630562Z"},"content_sha256":"20d13a6505490e48b8d7ae9485e8c5796c67dbe1ede76f4f59f84aa7bf0d1ad2","schema_version":"1.0","event_id":"sha256:20d13a6505490e48b8d7ae9485e8c5796c67dbe1ede76f4f59f84aa7bf0d1ad2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:OCCFXSB2EQYW4IEBSOS46VZ67L","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Inflation by spin and torsion in Poincare gauge theory of gravity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Elham Qorani, Fazeleh Khajenabi, Siamak Akhshabi","submitted_at":"2017-05-14T08:55:42Z","abstract_excerpt":"In Poincare gauge theory of gravity, in addition to mass-energy content, spin is also a source for gravitational interactions. Although the effects of spin are negligible at low energies, they can play a crucial role at very early universe when the spin density was very high. In this paper by choosing a suitable Lagrangian for Poincare gauge theory of gravity, and suitable energy-momentum and spin density tensors, we show that the effects of spin and torsion can lead to a inflationary phase without the need for any additional fields. No fine tuning of parameters is required in this setup. We a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.04931","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":"2026-05-18T00:32:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sr6anClycS0v/YYYlrMGYzasID2pBqyHIIaEXgW1f2J9XN/u6CEBUgGMZ29jOinJSqro4gKmxcIK3ZsOL6fUBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T19:53:41.631538Z"},"content_sha256":"e59a7de1d832e921fb9b25d1b81b3a46dff1d4a685aee46bcc3d92e6a3787c3b","schema_version":"1.0","event_id":"sha256:e59a7de1d832e921fb9b25d1b81b3a46dff1d4a685aee46bcc3d92e6a3787c3b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OCCFXSB2EQYW4IEBSOS46VZ67L/bundle.json","state_url":"https://pith.science/pith/OCCFXSB2EQYW4IEBSOS46VZ67L/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OCCFXSB2EQYW4IEBSOS46VZ67L/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":"2026-05-25T19:53:41Z","links":{"resolver":"https://pith.science/pith/OCCFXSB2EQYW4IEBSOS46VZ67L","bundle":"https://pith.science/pith/OCCFXSB2EQYW4IEBSOS46VZ67L/bundle.json","state":"https://pith.science/pith/OCCFXSB2EQYW4IEBSOS46VZ67L/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OCCFXSB2EQYW4IEBSOS46VZ67L/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:OCCFXSB2EQYW4IEBSOS46VZ67L","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":"93b80fe49ad5bdd4f8d3a87231063859a92b981306a1b2eb20786b8fee44dc71","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-05-14T08:55:42Z","title_canon_sha256":"bcbf2eda52ae7e463a90cb19b7681ea1ddf06eda571fae503faf5b8ac4b52f3c"},"schema_version":"1.0","source":{"id":"1705.04931","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1705.04931","created_at":"2026-05-18T00:32:10Z"},{"alias_kind":"arxiv_version","alias_value":"1705.04931v2","created_at":"2026-05-18T00:32:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.04931","created_at":"2026-05-18T00:32:10Z"},{"alias_kind":"pith_short_12","alias_value":"OCCFXSB2EQYW","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_16","alias_value":"OCCFXSB2EQYW4IEB","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_8","alias_value":"OCCFXSB2","created_at":"2026-05-18T12:31:34Z"}],"graph_snapshots":[{"event_id":"sha256:e59a7de1d832e921fb9b25d1b81b3a46dff1d4a685aee46bcc3d92e6a3787c3b","target":"graph","created_at":"2026-05-18T00:32:10Z","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":"In Poincare gauge theory of gravity, in addition to mass-energy content, spin is also a source for gravitational interactions. Although the effects of spin are negligible at low energies, they can play a crucial role at very early universe when the spin density was very high. In this paper by choosing a suitable Lagrangian for Poincare gauge theory of gravity, and suitable energy-momentum and spin density tensors, we show that the effects of spin and torsion can lead to a inflationary phase without the need for any additional fields. No fine tuning of parameters is required in this setup. We a","authors_text":"Elham Qorani, Fazeleh Khajenabi, Siamak Akhshabi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-05-14T08:55:42Z","title":"Inflation by spin and torsion in Poincare gauge theory of gravity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.04931","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":"sha256:20d13a6505490e48b8d7ae9485e8c5796c67dbe1ede76f4f59f84aa7bf0d1ad2","target":"record","created_at":"2026-05-18T00:32:10Z","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":"93b80fe49ad5bdd4f8d3a87231063859a92b981306a1b2eb20786b8fee44dc71","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-05-14T08:55:42Z","title_canon_sha256":"bcbf2eda52ae7e463a90cb19b7681ea1ddf06eda571fae503faf5b8ac4b52f3c"},"schema_version":"1.0","source":{"id":"1705.04931","kind":"arxiv","version":2}},"canonical_sha256":"70845bc83a24316e208193a5cf573efad540bf3f4edb8354dfb3ebedc85fddc3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"70845bc83a24316e208193a5cf573efad540bf3f4edb8354dfb3ebedc85fddc3","first_computed_at":"2026-05-18T00:32:10.268812Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:32:10.268812Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"FnBxgFVmDPchFQaaMC6EElRv4XqVQWBqUVpKOhEyL9AsbZ53KVNI5J709/V1MMvMqVbmsLDJsU9SLMLIWTB4Cg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:32:10.269484Z","signed_message":"canonical_sha256_bytes"},"source_id":"1705.04931","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:20d13a6505490e48b8d7ae9485e8c5796c67dbe1ede76f4f59f84aa7bf0d1ad2","sha256:e59a7de1d832e921fb9b25d1b81b3a46dff1d4a685aee46bcc3d92e6a3787c3b"],"state_sha256":"28f4de504a6ee597fc35bbd6225481b66cc7c49bbda516a27db61e8899ae9a23"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RjKSPUr/FEpAzGK8GPPJghHUg+y/1vauq+6g3elINzWB+DE2nK4SmKjt01Bli61PKylMYvGOzwhjAVjcmcBPAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T19:53:41.634587Z","bundle_sha256":"7bdb39551ba596d380b4db973a27a3527867a7b76fffebb11f279effa0109122"}}