{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:ZAXJKOZFCKYHDK7QWYXY4MTWYC","short_pith_number":"pith:ZAXJKOZF","schema_version":"1.0","canonical_sha256":"c82e953b2512b071abf0b62f8e3276c08432463b87f432a763c0d6b592568b4e","source":{"kind":"arxiv","id":"1609.00385","version":4},"attestation_state":"computed","paper":{"title":"Refining the boundaries of the classical de Sitter landscape","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","gr-qc","hep-ph"],"primary_cat":"hep-th","authors_text":"David Andriot, Johan Bl{\\aa}b\\\"ack","submitted_at":"2016-09-01T20:01:23Z","abstract_excerpt":"We derive highly constraining no-go theorems for classical de Sitter backgrounds of string theory, with parallel sources; this should impact the embedding of cosmological models. We study ten-dimensional vacua of type II supergravities with parallel and backreacted orientifold Op-planes and Dp-branes, on four-dimensional de Sitter space-time times a compact manifold. Vacua for p=3, 7 or 8 are completely excluded, and we obtain tight constraints for p=4, 5, 6. This is achieved through the derivation of an enlightening expression for the four-dimensional Ricci scalar. Further interesting express"},"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":"1609.00385","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2016-09-01T20:01:23Z","cross_cats_sorted":["astro-ph.CO","gr-qc","hep-ph"],"title_canon_sha256":"98d7d1c222238840f7c2dec26a017020a27d569a913c01f812db64610d68d624","abstract_canon_sha256":"f6e4048bb3414db16c667e7677c22c0b58c1ff490c1788fce539a263a3d3647d"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:22:16.389958Z","signature_b64":"huEyFWRAPMuNkjEMYvf9lyFHDemLK9PE+Em9V9fRtqoviZFCjHaA6mGRb9Drth60p/NnN/LnjQA+3P0vpqGiDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c82e953b2512b071abf0b62f8e3276c08432463b87f432a763c0d6b592568b4e","last_reissued_at":"2026-05-18T00:22:16.389475Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:22:16.389475Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Refining the boundaries of the classical de Sitter landscape","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","gr-qc","hep-ph"],"primary_cat":"hep-th","authors_text":"David Andriot, Johan Bl{\\aa}b\\\"ack","submitted_at":"2016-09-01T20:01:23Z","abstract_excerpt":"We derive highly constraining no-go theorems for classical de Sitter backgrounds of string theory, with parallel sources; this should impact the embedding of cosmological models. We study ten-dimensional vacua of type II supergravities with parallel and backreacted orientifold Op-planes and Dp-branes, on four-dimensional de Sitter space-time times a compact manifold. Vacua for p=3, 7 or 8 are completely excluded, and we obtain tight constraints for p=4, 5, 6. This is achieved through the derivation of an enlightening expression for the four-dimensional Ricci scalar. Further interesting express"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.00385","kind":"arxiv","version":4},"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":"1609.00385","created_at":"2026-05-18T00:22:16.389545+00:00"},{"alias_kind":"arxiv_version","alias_value":"1609.00385v4","created_at":"2026-05-18T00:22:16.389545+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.00385","created_at":"2026-05-18T00:22:16.389545+00:00"},{"alias_kind":"pith_short_12","alias_value":"ZAXJKOZFCKYH","created_at":"2026-05-18T12:30:53.716459+00:00"},{"alias_kind":"pith_short_16","alias_value":"ZAXJKOZFCKYHDK7Q","created_at":"2026-05-18T12:30:53.716459+00:00"},{"alias_kind":"pith_short_8","alias_value":"ZAXJKOZF","created_at":"2026-05-18T12:30:53.716459+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2603.25797","citing_title":"Dark energy from string theory: an introductory review","ref_index":86,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/ZAXJKOZFCKYHDK7QWYXY4MTWYC","json":"https://pith.science/pith/ZAXJKOZFCKYHDK7QWYXY4MTWYC.json","graph_json":"https://pith.science/api/pith-number/ZAXJKOZFCKYHDK7QWYXY4MTWYC/graph.json","events_json":"https://pith.science/api/pith-number/ZAXJKOZFCKYHDK7QWYXY4MTWYC/events.json","paper":"https://pith.science/paper/ZAXJKOZF"},"agent_actions":{"view_html":"https://pith.science/pith/ZAXJKOZFCKYHDK7QWYXY4MTWYC","download_json":"https://pith.science/pith/ZAXJKOZFCKYHDK7QWYXY4MTWYC.json","view_paper":"https://pith.science/paper/ZAXJKOZF","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1609.00385&json=true","fetch_graph":"https://pith.science/api/pith-number/ZAXJKOZFCKYHDK7QWYXY4MTWYC/graph.json","fetch_events":"https://pith.science/api/pith-number/ZAXJKOZFCKYHDK7QWYXY4MTWYC/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ZAXJKOZFCKYHDK7QWYXY4MTWYC/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ZAXJKOZFCKYHDK7QWYXY4MTWYC/action/storage_attestation","attest_author":"https://pith.science/pith/ZAXJKOZFCKYHDK7QWYXY4MTWYC/action/author_attestation","sign_citation":"https://pith.science/pith/ZAXJKOZFCKYHDK7QWYXY4MTWYC/action/citation_signature","submit_replication":"https://pith.science/pith/ZAXJKOZFCKYHDK7QWYXY4MTWYC/action/replication_record"}},"created_at":"2026-05-18T00:22:16.389545+00:00","updated_at":"2026-05-18T00:22:16.389545+00:00"}