{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:TGMHW6WKMLE6TNU67OP3ABKXD5","short_pith_number":"pith:TGMHW6WK","schema_version":"1.0","canonical_sha256":"99987b7aca62c9e9b69efb9fb005571f534dd2e7ebd4ef82688e206868f33bec","source":{"kind":"arxiv","id":"1809.05924","version":1},"attestation_state":"computed","paper":{"title":"Topology and the suppression of CMB large-angle correlations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Armando Bernui, Camila P. Novaes, Glenn D. Starkman, Thiago S. Pereira","submitted_at":"2018-09-16T18:21:31Z","abstract_excerpt":"To date, no compelling evidence has been found that the universe has non-trivial spatial topology. Meanwhile, anomalies in the observed CMB temperature map, such as the lack of correlations at large angular separations, remain observationally robust. We show that if our universe is flat and has one compact dimension of appropriate size (slab topology), this would suppress large-angle temperature correlations while maintaining a low-$\\ell$ angular power spectrum consistent with observations. The optimal length appears to be $1.4$ times the conformal radius of the CMB's last scattering surface ("},"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":"1809.05924","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-09-16T18:21:31Z","cross_cats_sorted":[],"title_canon_sha256":"56b083f25da0059a7684817be0c3c247f8c7f0099b598cc91bb84ac2e73fd824","abstract_canon_sha256":"3947ecdefa87fafaeb7eb9db4157fb509cbc2f0d93c03815ae741afb86554e36"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:05:36.110812Z","signature_b64":"kcSBfLTLwfJIWXuElwl5AN1Rxw4b6RYG+XwGJRZuQIGuChJpcBiUbwoQlYVX19PehPSAghqc9KlTbjtBjerWAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"99987b7aca62c9e9b69efb9fb005571f534dd2e7ebd4ef82688e206868f33bec","last_reissued_at":"2026-05-18T00:05:36.110382Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:05:36.110382Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Topology and the suppression of CMB large-angle correlations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Armando Bernui, Camila P. Novaes, Glenn D. Starkman, Thiago S. Pereira","submitted_at":"2018-09-16T18:21:31Z","abstract_excerpt":"To date, no compelling evidence has been found that the universe has non-trivial spatial topology. Meanwhile, anomalies in the observed CMB temperature map, such as the lack of correlations at large angular separations, remain observationally robust. We show that if our universe is flat and has one compact dimension of appropriate size (slab topology), this would suppress large-angle temperature correlations while maintaining a low-$\\ell$ angular power spectrum consistent with observations. The optimal length appears to be $1.4$ times the conformal radius of the CMB's last scattering surface ("},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.05924","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":"1809.05924","created_at":"2026-05-18T00:05:36.110445+00:00"},{"alias_kind":"arxiv_version","alias_value":"1809.05924v1","created_at":"2026-05-18T00:05:36.110445+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.05924","created_at":"2026-05-18T00:05:36.110445+00:00"},{"alias_kind":"pith_short_12","alias_value":"TGMHW6WKMLE6","created_at":"2026-05-18T12:32:53.628368+00:00"},{"alias_kind":"pith_short_16","alias_value":"TGMHW6WKMLE6TNU6","created_at":"2026-05-18T12:32:53.628368+00:00"},{"alias_kind":"pith_short_8","alias_value":"TGMHW6WK","created_at":"2026-05-18T12:32:53.628368+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"1906.10744","citing_title":"The angular scale of homogeneity in the Local Universe with the SDSS blue galaxies","ref_index":14,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/TGMHW6WKMLE6TNU67OP3ABKXD5","json":"https://pith.science/pith/TGMHW6WKMLE6TNU67OP3ABKXD5.json","graph_json":"https://pith.science/api/pith-number/TGMHW6WKMLE6TNU67OP3ABKXD5/graph.json","events_json":"https://pith.science/api/pith-number/TGMHW6WKMLE6TNU67OP3ABKXD5/events.json","paper":"https://pith.science/paper/TGMHW6WK"},"agent_actions":{"view_html":"https://pith.science/pith/TGMHW6WKMLE6TNU67OP3ABKXD5","download_json":"https://pith.science/pith/TGMHW6WKMLE6TNU67OP3ABKXD5.json","view_paper":"https://pith.science/paper/TGMHW6WK","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1809.05924&json=true","fetch_graph":"https://pith.science/api/pith-number/TGMHW6WKMLE6TNU67OP3ABKXD5/graph.json","fetch_events":"https://pith.science/api/pith-number/TGMHW6WKMLE6TNU67OP3ABKXD5/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/TGMHW6WKMLE6TNU67OP3ABKXD5/action/timestamp_anchor","attest_storage":"https://pith.science/pith/TGMHW6WKMLE6TNU67OP3ABKXD5/action/storage_attestation","attest_author":"https://pith.science/pith/TGMHW6WKMLE6TNU67OP3ABKXD5/action/author_attestation","sign_citation":"https://pith.science/pith/TGMHW6WKMLE6TNU67OP3ABKXD5/action/citation_signature","submit_replication":"https://pith.science/pith/TGMHW6WKMLE6TNU67OP3ABKXD5/action/replication_record"}},"created_at":"2026-05-18T00:05:36.110445+00:00","updated_at":"2026-05-18T00:05:36.110445+00:00"}