{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2003:UF3SQDDG6UNZXJC6PEK4KWMWHF","short_pith_number":"pith:UF3SQDDG","schema_version":"1.0","canonical_sha256":"a177280c66f51b9ba45e7915c559963940a7a4428306c72def9e98b0f367927c","source":{"kind":"arxiv","id":"gr-qc/0301113","version":2},"attestation_state":"computed","paper":{"title":"Spin Foam Models for Quantum Gravity","license":"","headline":"","cross_cats":["hep-th"],"primary_cat":"gr-qc","authors_text":"Alejandro Perez","submitted_at":"2003-01-27T22:59:37Z","abstract_excerpt":"In this article we review the present status of the spin foam formulation of non-perturbative (background independent) quantum gravity. The article is divided in two parts. In the first part we present a general introduction to the main ideas emphasizing their motivations from various perspectives. Riemannian 3-dimensional gravity is used as a simple example to illustrate conceptual issues and the main goals of the approach. The main features of the various existing models for 4-dimensional gravity are also presented here. We conclude with a discussion of important questions to be addressed in"},"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":"gr-qc/0301113","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"gr-qc","submitted_at":"2003-01-27T22:59:37Z","cross_cats_sorted":["hep-th"],"title_canon_sha256":"b52e3cc8094585c1a6f092902a3e68413d65539fc46eb79faf9d17c5cfb7406f","abstract_canon_sha256":"0e773e117b9b77dc2ab95cc5c6c6d653678c5d5a90897a5cb44b3651846628c7"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:37:31.948610Z","signature_b64":"YY1EZo7yQKzKK+3FIQDuLNWX84JNF0emYnJl19beOdkoSwT3xjusM+Kz2ESdQy4WIkzsJ4iXfIpUT0PwmGctBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a177280c66f51b9ba45e7915c559963940a7a4428306c72def9e98b0f367927c","last_reissued_at":"2026-05-18T00:37:31.948072Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:37:31.948072Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Spin Foam Models for Quantum Gravity","license":"","headline":"","cross_cats":["hep-th"],"primary_cat":"gr-qc","authors_text":"Alejandro Perez","submitted_at":"2003-01-27T22:59:37Z","abstract_excerpt":"In this article we review the present status of the spin foam formulation of non-perturbative (background independent) quantum gravity. The article is divided in two parts. In the first part we present a general introduction to the main ideas emphasizing their motivations from various perspectives. Riemannian 3-dimensional gravity is used as a simple example to illustrate conceptual issues and the main goals of the approach. The main features of the various existing models for 4-dimensional gravity are also presented here. We conclude with a discussion of important questions to be addressed in"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"gr-qc/0301113","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"gr-qc/0301113","created_at":"2026-05-18T00:37:31.948150+00:00"},{"alias_kind":"arxiv_version","alias_value":"gr-qc/0301113v2","created_at":"2026-05-18T00:37:31.948150+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.gr-qc/0301113","created_at":"2026-05-18T00:37:31.948150+00:00"},{"alias_kind":"pith_short_12","alias_value":"UF3SQDDG6UNZ","created_at":"2026-05-18T12:25:52.051335+00:00"},{"alias_kind":"pith_short_16","alias_value":"UF3SQDDG6UNZXJC6","created_at":"2026-05-18T12:25:52.051335+00:00"},{"alias_kind":"pith_short_8","alias_value":"UF3SQDDG","created_at":"2026-05-18T12:25:52.051335+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":2,"internal_anchor_count":2,"sample":[{"citing_arxiv_id":"2605.17935","citing_title":"The problem of time: a path integral view","ref_index":21,"is_internal_anchor":true},{"citing_arxiv_id":"2605.18977","citing_title":"Collective excitations in quantum gravity condensates","ref_index":42,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/UF3SQDDG6UNZXJC6PEK4KWMWHF","json":"https://pith.science/pith/UF3SQDDG6UNZXJC6PEK4KWMWHF.json","graph_json":"https://pith.science/api/pith-number/UF3SQDDG6UNZXJC6PEK4KWMWHF/graph.json","events_json":"https://pith.science/api/pith-number/UF3SQDDG6UNZXJC6PEK4KWMWHF/events.json","paper":"https://pith.science/paper/UF3SQDDG"},"agent_actions":{"view_html":"https://pith.science/pith/UF3SQDDG6UNZXJC6PEK4KWMWHF","download_json":"https://pith.science/pith/UF3SQDDG6UNZXJC6PEK4KWMWHF.json","view_paper":"https://pith.science/paper/UF3SQDDG","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=gr-qc/0301113&json=true","fetch_graph":"https://pith.science/api/pith-number/UF3SQDDG6UNZXJC6PEK4KWMWHF/graph.json","fetch_events":"https://pith.science/api/pith-number/UF3SQDDG6UNZXJC6PEK4KWMWHF/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/UF3SQDDG6UNZXJC6PEK4KWMWHF/action/timestamp_anchor","attest_storage":"https://pith.science/pith/UF3SQDDG6UNZXJC6PEK4KWMWHF/action/storage_attestation","attest_author":"https://pith.science/pith/UF3SQDDG6UNZXJC6PEK4KWMWHF/action/author_attestation","sign_citation":"https://pith.science/pith/UF3SQDDG6UNZXJC6PEK4KWMWHF/action/citation_signature","submit_replication":"https://pith.science/pith/UF3SQDDG6UNZXJC6PEK4KWMWHF/action/replication_record"}},"created_at":"2026-05-18T00:37:31.948150+00:00","updated_at":"2026-05-18T00:37:31.948150+00:00"}