{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:CZUFMYNTF2LYUJHCQM4XMA6537","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":"248726204ffb38fff3e46da7da6ee0d9034edc890ca08a6eada316278ca08b74","cross_cats_sorted":["math-ph","math.MP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2012-01-12T10:31:27Z","title_canon_sha256":"397400482e5572b8b6346f34ece24bc0ba254c855e049db5abc6c29914e4ce5c"},"schema_version":"1.0","source":{"id":"1201.2519","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1201.2519","created_at":"2026-05-18T01:58:52Z"},{"alias_kind":"arxiv_version","alias_value":"1201.2519v3","created_at":"2026-05-18T01:58:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1201.2519","created_at":"2026-05-18T01:58:52Z"},{"alias_kind":"pith_short_12","alias_value":"CZUFMYNTF2LY","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_16","alias_value":"CZUFMYNTF2LYUJHC","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_8","alias_value":"CZUFMYNT","created_at":"2026-05-18T12:27:01Z"}],"graph_snapshots":[{"event_id":"sha256:8b1a4d61062678124860fc24732f69f5c7cfa2a77e722ccfd1060d1d51c2980f","target":"graph","created_at":"2026-05-18T01:58:52Z","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":"In the special case of a spherically symmetric solution of Einstein equations coupled to a scalar massless field, we examine the consequences on the exact solution imposed by a semiclassical treatment of gravitational interaction when the scalar field is quantized. In agreement with the work of Doplicher, Fredenhagen and Roberts (DFR), imposing the principle of gravitational stability against localization of events, we find that the region where an event is localized, or where initial conditions can be assigned, has a minimal extension, of the order of the Planck length. This conclusion, thoug","authors_text":"Gerardo Morsella, Nicola Pinamonti, Sergio Doplicher","cross_cats":["math-ph","math.MP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2012-01-12T10:31:27Z","title":"On Quantum Spacetime and the horizon problem"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1201.2519","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":"sha256:7eb515768e36a4363771272b239c1430efadf6a1166446ecc8b9e65df4675991","target":"record","created_at":"2026-05-18T01:58:52Z","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":"248726204ffb38fff3e46da7da6ee0d9034edc890ca08a6eada316278ca08b74","cross_cats_sorted":["math-ph","math.MP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2012-01-12T10:31:27Z","title_canon_sha256":"397400482e5572b8b6346f34ece24bc0ba254c855e049db5abc6c29914e4ce5c"},"schema_version":"1.0","source":{"id":"1201.2519","kind":"arxiv","version":3}},"canonical_sha256":"16685661b32e978a24e283397603dddfdcb684e205ec22b1e7cec6a0f51cafd8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"16685661b32e978a24e283397603dddfdcb684e205ec22b1e7cec6a0f51cafd8","first_computed_at":"2026-05-18T01:58:52.278409Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:58:52.278409Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VRML1eawZYu4kZoczdeEMJ2cqlScSVIqNWHG147a+uARAHkQFcVKJWIQ+fjMPOdf7y+0eEqJIyWRg7izTBUFCw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:58:52.279097Z","signed_message":"canonical_sha256_bytes"},"source_id":"1201.2519","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7eb515768e36a4363771272b239c1430efadf6a1166446ecc8b9e65df4675991","sha256:8b1a4d61062678124860fc24732f69f5c7cfa2a77e722ccfd1060d1d51c2980f"],"state_sha256":"1d72e8082cae50febd21f46d4712a0683729c05064b14729f7cb09c75a286ca6"}