{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:SSSNZ7UACBTQKXEKTXIMHCXMHU","short_pith_number":"pith:SSSNZ7UA","canonical_record":{"source":{"id":"1606.02565","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2016-06-08T14:17:56Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"3eee972760365aabf6c4ee5db609885d2ab5170b9374f6598dcf116d0aeb7958","abstract_canon_sha256":"05b609bf64f4aa4e18c4b09c39e5a8dea4b8a9766df32439d534293d23de94c4"},"schema_version":"1.0"},"canonical_sha256":"94a4dcfe801067055c8a9dd0c38aec3d3f3947b8a3b5ae68bb7d507756a3a290","source":{"kind":"arxiv","id":"1606.02565","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1606.02565","created_at":"2026-05-18T00:32:36Z"},{"alias_kind":"arxiv_version","alias_value":"1606.02565v2","created_at":"2026-05-18T00:32:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1606.02565","created_at":"2026-05-18T00:32:36Z"},{"alias_kind":"pith_short_12","alias_value":"SSSNZ7UACBTQ","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_16","alias_value":"SSSNZ7UACBTQKXEK","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_8","alias_value":"SSSNZ7UA","created_at":"2026-05-18T12:30:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:SSSNZ7UACBTQKXEKTXIMHCXMHU","target":"record","payload":{"canonical_record":{"source":{"id":"1606.02565","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2016-06-08T14:17:56Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"3eee972760365aabf6c4ee5db609885d2ab5170b9374f6598dcf116d0aeb7958","abstract_canon_sha256":"05b609bf64f4aa4e18c4b09c39e5a8dea4b8a9766df32439d534293d23de94c4"},"schema_version":"1.0"},"canonical_sha256":"94a4dcfe801067055c8a9dd0c38aec3d3f3947b8a3b5ae68bb7d507756a3a290","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:32:36.499362Z","signature_b64":"4yPY78RyG8FIfjGL+V3fZjavzf76QXqa7VJ7fjbU1zTLE3XzXgHTfiigvQ0LtEjo3TiHY8gVJB8TqunuwnrhCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"94a4dcfe801067055c8a9dd0c38aec3d3f3947b8a3b5ae68bb7d507756a3a290","last_reissued_at":"2026-05-18T00:32:36.498676Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:32:36.498676Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1606.02565","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":"2026-05-18T00:32:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oAL8h/6z+ChpBPNX2+h9s7CVKjbLa60N5BUaeRqieR0TtiihpKgPJUikxgJnSJbs1k340lVWXjg83CV/GcrZCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T08:40:38.992716Z"},"content_sha256":"853a383d2cfe6cf3a3ed092b6c1acd59367a8c29d7e8fc5c18fbe8643abce240","schema_version":"1.0","event_id":"sha256:853a383d2cfe6cf3a3ed092b6c1acd59367a8c29d7e8fc5c18fbe8643abce240"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:SSSNZ7UACBTQKXEKTXIMHCXMHU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Self-accelerating Universe in modified gravity with dynamical torsion","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"hep-th","authors_text":"S. Randjbar-Daemi, V. Nikiforova, V. Rubakov","submitted_at":"2016-06-08T14:17:56Z","abstract_excerpt":"We consider a model belonging to the class of gravities with dynamical torsion. The model is free of ghosts and gradient instabilities about Minkowski and torsionless Einstein backgrounds. We find that at zero cosmological constant, the model admits a self-accelerating solution with non-Riemannian connection. Small value of the effective cosmological constant is obtained at the expense of the hierarchy between the dimensionless couplings."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.02565","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":"2026-05-18T00:32:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XcRcVYyvW9YmHTZYi3q5EKnx7w/7ptExiIN8DNMbVLS0i8K1Y6hoMIndCpjitY2ynvytR7KbNHJ3RNn8wtj6CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T08:40:38.993056Z"},"content_sha256":"693125e4a1bde5bd2b67497a7bb32cdc8165e653568bee1967e9b46d12c138f3","schema_version":"1.0","event_id":"sha256:693125e4a1bde5bd2b67497a7bb32cdc8165e653568bee1967e9b46d12c138f3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SSSNZ7UACBTQKXEKTXIMHCXMHU/bundle.json","state_url":"https://pith.science/pith/SSSNZ7UACBTQKXEKTXIMHCXMHU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SSSNZ7UACBTQKXEKTXIMHCXMHU/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":"2026-05-30T08:40:38Z","links":{"resolver":"https://pith.science/pith/SSSNZ7UACBTQKXEKTXIMHCXMHU","bundle":"https://pith.science/pith/SSSNZ7UACBTQKXEKTXIMHCXMHU/bundle.json","state":"https://pith.science/pith/SSSNZ7UACBTQKXEKTXIMHCXMHU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SSSNZ7UACBTQKXEKTXIMHCXMHU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:SSSNZ7UACBTQKXEKTXIMHCXMHU","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":"05b609bf64f4aa4e18c4b09c39e5a8dea4b8a9766df32439d534293d23de94c4","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2016-06-08T14:17:56Z","title_canon_sha256":"3eee972760365aabf6c4ee5db609885d2ab5170b9374f6598dcf116d0aeb7958"},"schema_version":"1.0","source":{"id":"1606.02565","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1606.02565","created_at":"2026-05-18T00:32:36Z"},{"alias_kind":"arxiv_version","alias_value":"1606.02565v2","created_at":"2026-05-18T00:32:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1606.02565","created_at":"2026-05-18T00:32:36Z"},{"alias_kind":"pith_short_12","alias_value":"SSSNZ7UACBTQ","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_16","alias_value":"SSSNZ7UACBTQKXEK","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_8","alias_value":"SSSNZ7UA","created_at":"2026-05-18T12:30:44Z"}],"graph_snapshots":[{"event_id":"sha256:693125e4a1bde5bd2b67497a7bb32cdc8165e653568bee1967e9b46d12c138f3","target":"graph","created_at":"2026-05-18T00:32:36Z","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 consider a model belonging to the class of gravities with dynamical torsion. The model is free of ghosts and gradient instabilities about Minkowski and torsionless Einstein backgrounds. We find that at zero cosmological constant, the model admits a self-accelerating solution with non-Riemannian connection. Small value of the effective cosmological constant is obtained at the expense of the hierarchy between the dimensionless couplings.","authors_text":"S. Randjbar-Daemi, V. Nikiforova, V. Rubakov","cross_cats":["gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2016-06-08T14:17:56Z","title":"Self-accelerating Universe in modified gravity with dynamical torsion"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.02565","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":"sha256:853a383d2cfe6cf3a3ed092b6c1acd59367a8c29d7e8fc5c18fbe8643abce240","target":"record","created_at":"2026-05-18T00:32:36Z","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":"05b609bf64f4aa4e18c4b09c39e5a8dea4b8a9766df32439d534293d23de94c4","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2016-06-08T14:17:56Z","title_canon_sha256":"3eee972760365aabf6c4ee5db609885d2ab5170b9374f6598dcf116d0aeb7958"},"schema_version":"1.0","source":{"id":"1606.02565","kind":"arxiv","version":2}},"canonical_sha256":"94a4dcfe801067055c8a9dd0c38aec3d3f3947b8a3b5ae68bb7d507756a3a290","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"94a4dcfe801067055c8a9dd0c38aec3d3f3947b8a3b5ae68bb7d507756a3a290","first_computed_at":"2026-05-18T00:32:36.498676Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:32:36.498676Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4yPY78RyG8FIfjGL+V3fZjavzf76QXqa7VJ7fjbU1zTLE3XzXgHTfiigvQ0LtEjo3TiHY8gVJB8TqunuwnrhCg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:32:36.499362Z","signed_message":"canonical_sha256_bytes"},"source_id":"1606.02565","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:853a383d2cfe6cf3a3ed092b6c1acd59367a8c29d7e8fc5c18fbe8643abce240","sha256:693125e4a1bde5bd2b67497a7bb32cdc8165e653568bee1967e9b46d12c138f3"],"state_sha256":"b25fa5f200bd528a78235b2f564892f050b965d27455b776540dabe5cd2d4d95"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sWA1kJMmhe3UJJl60taD0mPJimrR1XH76vY567AQDMNi2GdIrsZUuVLdL85sdQxHchG1HLhKSMgy6dgzcDIcCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T08:40:38.995164Z","bundle_sha256":"97ed3aa88f6f0620c39345ffda731c462c354e3772fe99dd63bf1f83c398c02b"}}