{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:QG2PLCPT23PDETDDRLFLDEZUHM","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":"0b1bc39294b38cd96c44c6e7bcc26b12c78767699bcdb653cb31411722b458d5","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-03-16T18:03:04Z","title_canon_sha256":"2e5769f98dc74cc56993ed5083079f4550f932471523421ebc0d4e2c3fc24dc0"},"schema_version":"1.0","source":{"id":"1303.4004","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1303.4004","created_at":"2026-05-18T03:30:40Z"},{"alias_kind":"arxiv_version","alias_value":"1303.4004v1","created_at":"2026-05-18T03:30:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.4004","created_at":"2026-05-18T03:30:40Z"},{"alias_kind":"pith_short_12","alias_value":"QG2PLCPT23PD","created_at":"2026-05-18T12:27:57Z"},{"alias_kind":"pith_short_16","alias_value":"QG2PLCPT23PDETDD","created_at":"2026-05-18T12:27:57Z"},{"alias_kind":"pith_short_8","alias_value":"QG2PLCPT","created_at":"2026-05-18T12:27:57Z"}],"graph_snapshots":[{"event_id":"sha256:54dde3780a08dc15c0d5d254eb88aef1876255aae802287a38b1526e9df1634e","target":"graph","created_at":"2026-05-18T03:30:40Z","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":"We impose constraints on the topology of the Universe determined from a search for matched circles in the cosmic microwave background (CMB) temperature anisotropy patterns of the 7-year WMAP data. We pay special attention to the sensitivity of the method to residual foreground contamination of the sky maps. A search for pairs of matched back-to-back circles in the higher resolution WMAP W-band map allows tighter constraints to be imposed on topology. Our results rule out universes with topologies that predict pairs of such circles with radii larger than approximately 10 degrees. This places a ","authors_text":"A. J. Banday, K. M. Gorski, P. Bielewicz","cross_cats":["gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-03-16T18:03:04Z","title":"Constraints on the topology of the Universe derived from the 7-year WMAP CMB data and prospects of constraining the topology using CMB polarisation maps"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.4004","kind":"arxiv","version":1},"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":"sha256:28a94c3d206e47a93d5fe9629d0e8d7ee69f812d5b1c5991c93f1aaf0e77a122","target":"record","created_at":"2026-05-18T03:30:40Z","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":"0b1bc39294b38cd96c44c6e7bcc26b12c78767699bcdb653cb31411722b458d5","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-03-16T18:03:04Z","title_canon_sha256":"2e5769f98dc74cc56993ed5083079f4550f932471523421ebc0d4e2c3fc24dc0"},"schema_version":"1.0","source":{"id":"1303.4004","kind":"arxiv","version":1}},"canonical_sha256":"81b4f589f3d6de324c638acab193343b0d29b4411ed593459721c81ec441c28e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"81b4f589f3d6de324c638acab193343b0d29b4411ed593459721c81ec441c28e","first_computed_at":"2026-05-18T03:30:40.206256Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:30:40.206256Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0+A/u5xDmMAUflhNb1DGSK2J+dimDUMgo3yPek8hb7Wl/2jLcdSDKCDIpoz6+9lgDgfsN4lytx/EJ7cxYb58DQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:30:40.207082Z","signed_message":"canonical_sha256_bytes"},"source_id":"1303.4004","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:28a94c3d206e47a93d5fe9629d0e8d7ee69f812d5b1c5991c93f1aaf0e77a122","sha256:54dde3780a08dc15c0d5d254eb88aef1876255aae802287a38b1526e9df1634e"],"state_sha256":"0d048c6aa27cd07d0614cfc256e6f43afd4ea8b854c71166edb84ff2397009a5"}