{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:5VJORAF4ORBFEUPXRG5VVRCV7Y","short_pith_number":"pith:5VJORAF4","canonical_record":{"source":{"id":"1702.08908","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-02-28T18:59:04Z","cross_cats_sorted":["astro-ph.CO","hep-th"],"title_canon_sha256":"67fbf2de7c69de8150a6c2f187ab56f6b4e1db1556d4cd82680b272f15faf53a","abstract_canon_sha256":"d3b7ad989ed1dbe5197a767e7bd34699589d1788d143824eabf79e36ddb269e6"},"schema_version":"1.0"},"canonical_sha256":"ed52e880bc74425251f789bb5ac455fe32049f18333f1b08dac097ff193277c5","source":{"kind":"arxiv","id":"1702.08908","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.08908","created_at":"2026-05-18T00:19:49Z"},{"alias_kind":"arxiv_version","alias_value":"1702.08908v3","created_at":"2026-05-18T00:19:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.08908","created_at":"2026-05-18T00:19:49Z"},{"alias_kind":"pith_short_12","alias_value":"5VJORAF4ORBF","created_at":"2026-05-18T12:31:00Z"},{"alias_kind":"pith_short_16","alias_value":"5VJORAF4ORBFEUPX","created_at":"2026-05-18T12:31:00Z"},{"alias_kind":"pith_short_8","alias_value":"5VJORAF4","created_at":"2026-05-18T12:31:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:5VJORAF4ORBFEUPXRG5VVRCV7Y","target":"record","payload":{"canonical_record":{"source":{"id":"1702.08908","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-02-28T18:59:04Z","cross_cats_sorted":["astro-ph.CO","hep-th"],"title_canon_sha256":"67fbf2de7c69de8150a6c2f187ab56f6b4e1db1556d4cd82680b272f15faf53a","abstract_canon_sha256":"d3b7ad989ed1dbe5197a767e7bd34699589d1788d143824eabf79e36ddb269e6"},"schema_version":"1.0"},"canonical_sha256":"ed52e880bc74425251f789bb5ac455fe32049f18333f1b08dac097ff193277c5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:19:49.206507Z","signature_b64":"jYQ8UjSCbWT4MUS1IZ5Pm7w6dKKxoRJbsFk21vFxs8LdSFsyO4WkHg0MgJlDOMFC00MRtQRBKsnhTfJcvX2CBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ed52e880bc74425251f789bb5ac455fe32049f18333f1b08dac097ff193277c5","last_reissued_at":"2026-05-18T00:19:49.205767Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:19:49.205767Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1702.08908","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:19:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gGuTDp9uYGugPbe/8+wUlJ0kfxzqOxjffflho0HNPCnM6XhCgd/e1I9hHMgQgDZp5IZ1L88Z9ET4ihA3WuRqBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T05:26:04.281704Z"},"content_sha256":"a442229d61cde62b73b86cccfee7e185bff75e0bb33ab131179a577d642530d5","schema_version":"1.0","event_id":"sha256:a442229d61cde62b73b86cccfee7e185bff75e0bb33ab131179a577d642530d5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:5VJORAF4ORBFEUPXRG5VVRCV7Y","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On nonlocally interacting metrics, and a simple proposal for cosmic acceleration","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","hep-th"],"primary_cat":"gr-qc","authors_text":"Alessandra Silvestri, Luca Amendola, Valeri Vardanyan, Yashar Akrami","submitted_at":"2017-02-28T18:59:04Z","abstract_excerpt":"We propose a simple, nonlocal modification to general relativity (GR) on large scales, which provides a model of late-time cosmic acceleration in the absence of the cosmological constant and with the same number of free parameters as in standard cosmology. The model is motivated by adding to the gravity sector an extra spin-2 field interacting nonlocally with the physical metric coupled to matter. The form of the nonlocal interaction is inspired by the simplest form of the Deser-Woodard (DW) model, $\\alpha R\\frac{1}{\\Box}R$, with one of the Ricci scalars being replaced by a constant $m^{2}$, a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.08908","kind":"arxiv","version":3},"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":"2026-05-18T00:19:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VGuoMJYZIsTgAWtAVqCHIcl6ppSosDVCPIgo/o31xJ5pGOBG4Z0U4yRjxBM2u/qHSM1In42Xzv+Mwfdt0nKnAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T05:26:04.282053Z"},"content_sha256":"e10e64483931eb598764da6d302b1c6216384d98067b655df1bc8149f7865444","schema_version":"1.0","event_id":"sha256:e10e64483931eb598764da6d302b1c6216384d98067b655df1bc8149f7865444"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5VJORAF4ORBFEUPXRG5VVRCV7Y/bundle.json","state_url":"https://pith.science/pith/5VJORAF4ORBFEUPXRG5VVRCV7Y/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5VJORAF4ORBFEUPXRG5VVRCV7Y/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":"2026-06-03T05:26:04Z","links":{"resolver":"https://pith.science/pith/5VJORAF4ORBFEUPXRG5VVRCV7Y","bundle":"https://pith.science/pith/5VJORAF4ORBFEUPXRG5VVRCV7Y/bundle.json","state":"https://pith.science/pith/5VJORAF4ORBFEUPXRG5VVRCV7Y/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5VJORAF4ORBFEUPXRG5VVRCV7Y/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:5VJORAF4ORBFEUPXRG5VVRCV7Y","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":"d3b7ad989ed1dbe5197a767e7bd34699589d1788d143824eabf79e36ddb269e6","cross_cats_sorted":["astro-ph.CO","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-02-28T18:59:04Z","title_canon_sha256":"67fbf2de7c69de8150a6c2f187ab56f6b4e1db1556d4cd82680b272f15faf53a"},"schema_version":"1.0","source":{"id":"1702.08908","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.08908","created_at":"2026-05-18T00:19:49Z"},{"alias_kind":"arxiv_version","alias_value":"1702.08908v3","created_at":"2026-05-18T00:19:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.08908","created_at":"2026-05-18T00:19:49Z"},{"alias_kind":"pith_short_12","alias_value":"5VJORAF4ORBF","created_at":"2026-05-18T12:31:00Z"},{"alias_kind":"pith_short_16","alias_value":"5VJORAF4ORBFEUPX","created_at":"2026-05-18T12:31:00Z"},{"alias_kind":"pith_short_8","alias_value":"5VJORAF4","created_at":"2026-05-18T12:31:00Z"}],"graph_snapshots":[{"event_id":"sha256:e10e64483931eb598764da6d302b1c6216384d98067b655df1bc8149f7865444","target":"graph","created_at":"2026-05-18T00:19:49Z","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 propose a simple, nonlocal modification to general relativity (GR) on large scales, which provides a model of late-time cosmic acceleration in the absence of the cosmological constant and with the same number of free parameters as in standard cosmology. The model is motivated by adding to the gravity sector an extra spin-2 field interacting nonlocally with the physical metric coupled to matter. The form of the nonlocal interaction is inspired by the simplest form of the Deser-Woodard (DW) model, $\\alpha R\\frac{1}{\\Box}R$, with one of the Ricci scalars being replaced by a constant $m^{2}$, a","authors_text":"Alessandra Silvestri, Luca Amendola, Valeri Vardanyan, Yashar Akrami","cross_cats":["astro-ph.CO","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-02-28T18:59:04Z","title":"On nonlocally interacting metrics, and a simple proposal for cosmic acceleration"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.08908","kind":"arxiv","version":3},"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:a442229d61cde62b73b86cccfee7e185bff75e0bb33ab131179a577d642530d5","target":"record","created_at":"2026-05-18T00:19:49Z","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":"d3b7ad989ed1dbe5197a767e7bd34699589d1788d143824eabf79e36ddb269e6","cross_cats_sorted":["astro-ph.CO","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2017-02-28T18:59:04Z","title_canon_sha256":"67fbf2de7c69de8150a6c2f187ab56f6b4e1db1556d4cd82680b272f15faf53a"},"schema_version":"1.0","source":{"id":"1702.08908","kind":"arxiv","version":3}},"canonical_sha256":"ed52e880bc74425251f789bb5ac455fe32049f18333f1b08dac097ff193277c5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ed52e880bc74425251f789bb5ac455fe32049f18333f1b08dac097ff193277c5","first_computed_at":"2026-05-18T00:19:49.205767Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:19:49.205767Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jYQ8UjSCbWT4MUS1IZ5Pm7w6dKKxoRJbsFk21vFxs8LdSFsyO4WkHg0MgJlDOMFC00MRtQRBKsnhTfJcvX2CBA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:19:49.206507Z","signed_message":"canonical_sha256_bytes"},"source_id":"1702.08908","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a442229d61cde62b73b86cccfee7e185bff75e0bb33ab131179a577d642530d5","sha256:e10e64483931eb598764da6d302b1c6216384d98067b655df1bc8149f7865444"],"state_sha256":"e68c21a23427c57788cdb9921148eef91b34b412852c18f18b13ab5ff6c26db9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"h5DFbLrYZpEG7P+o/yqKYsmA6EfLmoidQbYEt+O6vHqt7Yx9Lp+/iM2X9W9oQsUutXquAyw17ZpJwrBINhEDAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T05:26:04.284186Z","bundle_sha256":"987a305a8478b7d7bf73308183bc7c9cfb5031ba5c026faa7c9074e570efd62c"}}