{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2010:D4FM7HPBOECZ5RTTM7IWMOER4A","short_pith_number":"pith:D4FM7HPB","schema_version":"1.0","canonical_sha256":"1f0acf9de171059ec67367d1663891e01295c7861448c91877de2888cb7e176e","source":{"kind":"arxiv","id":"1011.0861","version":1},"attestation_state":"computed","paper":{"title":"Cosmic acceleration and the challenge of modifying gravity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-th"],"primary_cat":"astro-ph.CO","authors_text":"Mark Trodden","submitted_at":"2010-11-03T12:30:14Z","abstract_excerpt":"I briefly discuss the challenges presented by attempting to modify general relativity to obtain an explanation for the observed accelerated expansion of the universe. Foremost among these are the questions of theoretical consistency - the avoidance of ghosts in particular - and the constraints imposed by precision local tests of gravity within the solar system. For those models that clear these highly constraining hurdles, modern observational cosmology offers its own suite of tests, improving with upcoming datasets, that offer the possibility of ruling out modified gravity approaches or provi"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1011.0861","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-11-03T12:30:14Z","cross_cats_sorted":["hep-th"],"title_canon_sha256":"aa6c3d5f6083bf451fa1a0b7adb37dbe758cac2b3bda1549548e084d171b0885","abstract_canon_sha256":"f22072a59421b8439b4bcf2dcc92c7d303e04cc58f443dd90d6dbff44a3f7d89"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:04:53.288998Z","signature_b64":"ahPYducsdlyJidogknvE3LXYg/A+DLROvoxyZzfPFFRmLBPezoxNLqrsECCn9uR9r7GSjBKYgFM4eFzmPc0GDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1f0acf9de171059ec67367d1663891e01295c7861448c91877de2888cb7e176e","last_reissued_at":"2026-05-18T02:04:53.288555Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:04:53.288555Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Cosmic acceleration and the challenge of modifying gravity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-th"],"primary_cat":"astro-ph.CO","authors_text":"Mark Trodden","submitted_at":"2010-11-03T12:30:14Z","abstract_excerpt":"I briefly discuss the challenges presented by attempting to modify general relativity to obtain an explanation for the observed accelerated expansion of the universe. Foremost among these are the questions of theoretical consistency - the avoidance of ghosts in particular - and the constraints imposed by precision local tests of gravity within the solar system. For those models that clear these highly constraining hurdles, modern observational cosmology offers its own suite of tests, improving with upcoming datasets, that offer the possibility of ruling out modified gravity approaches or provi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1011.0861","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1011.0861","created_at":"2026-05-18T02:04:53.288614+00:00"},{"alias_kind":"arxiv_version","alias_value":"1011.0861v1","created_at":"2026-05-18T02:04:53.288614+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1011.0861","created_at":"2026-05-18T02:04:53.288614+00:00"},{"alias_kind":"pith_short_12","alias_value":"D4FM7HPBOECZ","created_at":"2026-05-18T12:26:06.534383+00:00"},{"alias_kind":"pith_short_16","alias_value":"D4FM7HPBOECZ5RTT","created_at":"2026-05-18T12:26:06.534383+00:00"},{"alias_kind":"pith_short_8","alias_value":"D4FM7HPB","created_at":"2026-05-18T12:26:06.534383+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/D4FM7HPBOECZ5RTTM7IWMOER4A","json":"https://pith.science/pith/D4FM7HPBOECZ5RTTM7IWMOER4A.json","graph_json":"https://pith.science/api/pith-number/D4FM7HPBOECZ5RTTM7IWMOER4A/graph.json","events_json":"https://pith.science/api/pith-number/D4FM7HPBOECZ5RTTM7IWMOER4A/events.json","paper":"https://pith.science/paper/D4FM7HPB"},"agent_actions":{"view_html":"https://pith.science/pith/D4FM7HPBOECZ5RTTM7IWMOER4A","download_json":"https://pith.science/pith/D4FM7HPBOECZ5RTTM7IWMOER4A.json","view_paper":"https://pith.science/paper/D4FM7HPB","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1011.0861&json=true","fetch_graph":"https://pith.science/api/pith-number/D4FM7HPBOECZ5RTTM7IWMOER4A/graph.json","fetch_events":"https://pith.science/api/pith-number/D4FM7HPBOECZ5RTTM7IWMOER4A/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/D4FM7HPBOECZ5RTTM7IWMOER4A/action/timestamp_anchor","attest_storage":"https://pith.science/pith/D4FM7HPBOECZ5RTTM7IWMOER4A/action/storage_attestation","attest_author":"https://pith.science/pith/D4FM7HPBOECZ5RTTM7IWMOER4A/action/author_attestation","sign_citation":"https://pith.science/pith/D4FM7HPBOECZ5RTTM7IWMOER4A/action/citation_signature","submit_replication":"https://pith.science/pith/D4FM7HPBOECZ5RTTM7IWMOER4A/action/replication_record"}},"created_at":"2026-05-18T02:04:53.288614+00:00","updated_at":"2026-05-18T02:04:53.288614+00:00"}