{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2024:CSVMKSVIG2TP72KOI7QEHFRZ7Q","short_pith_number":"pith:CSVMKSVI","schema_version":"1.0","canonical_sha256":"14aac54aa836a6ffe94e47e0439639fc016c8ebd2e5a0f694ce38cbe994bf07a","source":{"kind":"arxiv","id":"2407.13583","version":1},"attestation_state":"computed","paper":{"title":"Emergent modified gravity: Polarized Gowdy model on a torus","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Erick I. Duque, Martin Bojowald","submitted_at":"2024-07-18T15:25:33Z","abstract_excerpt":"New covariant theories of emergent modified gravity exist not only in spherically symmetric models, as previously found, but also in polarized Gowdy systems that have a local propagating degree of freedom. Several explicit versions are derived here, depending on various modification functions. These models do not have instabilities from higher time derivatives, and a large subset is compatible with gravitational waves and minimally coupled massless matter fields travelling at the same speed. Interpreted as models of loop quantum gravity, covariant Hamiltonian constraints derived from the covar"},"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":"2407.13583","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2024-07-18T15:25:33Z","cross_cats_sorted":[],"title_canon_sha256":"fe21ef0e7b037f0a0e32d2ae1819138df01c3b77aa6191279432cb5bdb5f9458","abstract_canon_sha256":"c35aae25d1dd851672f0976dca62533ea5817018fb6356b1b867d61c3c267c8b"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T09:43:31.768980Z","signature_b64":"uPHPoSNn8zzgyKQ0kRinBtDJUbQMCoQ4Q0rB+F6Ae1Vo7ALsAeA6OG324v5/keFxmoOHpzh4GS3aOpYtXSGgCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"14aac54aa836a6ffe94e47e0439639fc016c8ebd2e5a0f694ce38cbe994bf07a","last_reissued_at":"2026-07-05T09:43:31.768471Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T09:43:31.768471Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Emergent modified gravity: Polarized Gowdy model on a torus","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Erick I. Duque, Martin Bojowald","submitted_at":"2024-07-18T15:25:33Z","abstract_excerpt":"New covariant theories of emergent modified gravity exist not only in spherically symmetric models, as previously found, but also in polarized Gowdy systems that have a local propagating degree of freedom. Several explicit versions are derived here, depending on various modification functions. These models do not have instabilities from higher time derivatives, and a large subset is compatible with gravitational waves and minimally coupled massless matter fields travelling at the same speed. Interpreted as models of loop quantum gravity, covariant Hamiltonian constraints derived from the covar"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2407.13583","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2407.13583/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2407.13583","created_at":"2026-07-05T09:43:31.768540+00:00"},{"alias_kind":"arxiv_version","alias_value":"2407.13583v1","created_at":"2026-07-05T09:43:31.768540+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2407.13583","created_at":"2026-07-05T09:43:31.768540+00:00"},{"alias_kind":"pith_short_12","alias_value":"CSVMKSVIG2TP","created_at":"2026-07-05T09:43:31.768540+00:00"},{"alias_kind":"pith_short_16","alias_value":"CSVMKSVIG2TP72KO","created_at":"2026-07-05T09:43:31.768540+00:00"},{"alias_kind":"pith_short_8","alias_value":"CSVMKSVI","created_at":"2026-07-05T09:43:31.768540+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2507.14358","citing_title":"Perturbative emergent modified gravity on cosmological backgrounds: Kinematics","ref_index":7,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/CSVMKSVIG2TP72KOI7QEHFRZ7Q","json":"https://pith.science/pith/CSVMKSVIG2TP72KOI7QEHFRZ7Q.json","graph_json":"https://pith.science/api/pith-number/CSVMKSVIG2TP72KOI7QEHFRZ7Q/graph.json","events_json":"https://pith.science/api/pith-number/CSVMKSVIG2TP72KOI7QEHFRZ7Q/events.json","paper":"https://pith.science/paper/CSVMKSVI"},"agent_actions":{"view_html":"https://pith.science/pith/CSVMKSVIG2TP72KOI7QEHFRZ7Q","download_json":"https://pith.science/pith/CSVMKSVIG2TP72KOI7QEHFRZ7Q.json","view_paper":"https://pith.science/paper/CSVMKSVI","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2407.13583&json=true","fetch_graph":"https://pith.science/api/pith-number/CSVMKSVIG2TP72KOI7QEHFRZ7Q/graph.json","fetch_events":"https://pith.science/api/pith-number/CSVMKSVIG2TP72KOI7QEHFRZ7Q/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/CSVMKSVIG2TP72KOI7QEHFRZ7Q/action/timestamp_anchor","attest_storage":"https://pith.science/pith/CSVMKSVIG2TP72KOI7QEHFRZ7Q/action/storage_attestation","attest_author":"https://pith.science/pith/CSVMKSVIG2TP72KOI7QEHFRZ7Q/action/author_attestation","sign_citation":"https://pith.science/pith/CSVMKSVIG2TP72KOI7QEHFRZ7Q/action/citation_signature","submit_replication":"https://pith.science/pith/CSVMKSVIG2TP72KOI7QEHFRZ7Q/action/replication_record"}},"created_at":"2026-07-05T09:43:31.768540+00:00","updated_at":"2026-07-05T09:43:31.768540+00:00"}