{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:4U2HOM5TTVLMWP3XAH7NFAZIUV","short_pith_number":"pith:4U2HOM5T","canonical_record":{"source":{"id":"1602.01577","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-02-04T07:57:14Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"0c6b1deba84a8cbb34c70bbb66fbf5af6a5f6bfb8917312703b03a045f8424c6","abstract_canon_sha256":"9d76a08ba93c79bae7ccc2116a175c2a882792dc9beb6ce907175caaf79d8513"},"schema_version":"1.0"},"canonical_sha256":"e5347733b39d56cb3f7701fed28328a54734629f1ba5c5b30c003d65a4bd3e1d","source":{"kind":"arxiv","id":"1602.01577","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.01577","created_at":"2026-05-18T00:20:07Z"},{"alias_kind":"arxiv_version","alias_value":"1602.01577v4","created_at":"2026-05-18T00:20:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.01577","created_at":"2026-05-18T00:20:07Z"},{"alias_kind":"pith_short_12","alias_value":"4U2HOM5TTVLM","created_at":"2026-05-18T12:29:58Z"},{"alias_kind":"pith_short_16","alias_value":"4U2HOM5TTVLMWP3X","created_at":"2026-05-18T12:29:58Z"},{"alias_kind":"pith_short_8","alias_value":"4U2HOM5T","created_at":"2026-05-18T12:29:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:4U2HOM5TTVLMWP3XAH7NFAZIUV","target":"record","payload":{"canonical_record":{"source":{"id":"1602.01577","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-02-04T07:57:14Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"0c6b1deba84a8cbb34c70bbb66fbf5af6a5f6bfb8917312703b03a045f8424c6","abstract_canon_sha256":"9d76a08ba93c79bae7ccc2116a175c2a882792dc9beb6ce907175caaf79d8513"},"schema_version":"1.0"},"canonical_sha256":"e5347733b39d56cb3f7701fed28328a54734629f1ba5c5b30c003d65a4bd3e1d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:20:07.649345Z","signature_b64":"iznKPP3s8aL91E5AoehptJH31mjzd7Y1QV5LDzS+/k5lPBfMWUuEaWil83Hbi+qSBE8ffvClC+hm9NpbRKEGBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e5347733b39d56cb3f7701fed28328a54734629f1ba5c5b30c003d65a4bd3e1d","last_reissued_at":"2026-05-18T00:20:07.648662Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:20:07.648662Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1602.01577","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:20:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hJvTFgf+PvK0YQNT9LVEdDmVoZOUzwlCXaATEpW0JVnw/JyMOhcRFyvvOudUyr/RmuiwgRBHEwfG25y3Rs2nAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T14:38:44.414765Z"},"content_sha256":"e98e0fbfa2f716247a7163f358cf45634e01690b6148c2dcd1e9951ab80245f5","schema_version":"1.0","event_id":"sha256:e98e0fbfa2f716247a7163f358cf45634e01690b6148c2dcd1e9951ab80245f5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:4U2HOM5TTVLMWP3XAH7NFAZIUV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"New Coupled Codes Constructed by Overlapping Circular SC-LDPC Codes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Bohwan Jun, Dong-Joon Shin, Heeyoul Kwak, Jong-Seon No, Pilwoong Yang","submitted_at":"2016-02-04T07:57:14Z","abstract_excerpt":"In this paper, we propose new coupled codes constructed by overlapping circular spatially-coupled low-density parity-check (SC-LDPC) codes, which show better asymptotic and finite-length decoding performance compared to the conventional SC-LDPC codes. The performance improvement comes from the property that the proposed codes effectively split into two separated SC-LDPC codes with shorter chain length during the decoding process. We verify that the property of the proposed codes is valid in asymptotic setting via analysis tools such as the density evolution and the expected graph evolution. Ex"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.01577","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:20:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tm3Bpe6Um5OsMvpTl4cVfjaPWOU4q0AL+0ksJcv4Cx3TH+7Rt2G2hcvAsK458kGmRkZXKr8nMJXU4f7uFQWyAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T14:38:44.415340Z"},"content_sha256":"db54bb58755c7f81ef0d9e71382398dd485a50a929fdab1d0e3c71ce916cfad4","schema_version":"1.0","event_id":"sha256:db54bb58755c7f81ef0d9e71382398dd485a50a929fdab1d0e3c71ce916cfad4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4U2HOM5TTVLMWP3XAH7NFAZIUV/bundle.json","state_url":"https://pith.science/pith/4U2HOM5TTVLMWP3XAH7NFAZIUV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4U2HOM5TTVLMWP3XAH7NFAZIUV/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-30T14:38:44Z","links":{"resolver":"https://pith.science/pith/4U2HOM5TTVLMWP3XAH7NFAZIUV","bundle":"https://pith.science/pith/4U2HOM5TTVLMWP3XAH7NFAZIUV/bundle.json","state":"https://pith.science/pith/4U2HOM5TTVLMWP3XAH7NFAZIUV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4U2HOM5TTVLMWP3XAH7NFAZIUV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:4U2HOM5TTVLMWP3XAH7NFAZIUV","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":"9d76a08ba93c79bae7ccc2116a175c2a882792dc9beb6ce907175caaf79d8513","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-02-04T07:57:14Z","title_canon_sha256":"0c6b1deba84a8cbb34c70bbb66fbf5af6a5f6bfb8917312703b03a045f8424c6"},"schema_version":"1.0","source":{"id":"1602.01577","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.01577","created_at":"2026-05-18T00:20:07Z"},{"alias_kind":"arxiv_version","alias_value":"1602.01577v4","created_at":"2026-05-18T00:20:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.01577","created_at":"2026-05-18T00:20:07Z"},{"alias_kind":"pith_short_12","alias_value":"4U2HOM5TTVLM","created_at":"2026-05-18T12:29:58Z"},{"alias_kind":"pith_short_16","alias_value":"4U2HOM5TTVLMWP3X","created_at":"2026-05-18T12:29:58Z"},{"alias_kind":"pith_short_8","alias_value":"4U2HOM5T","created_at":"2026-05-18T12:29:58Z"}],"graph_snapshots":[{"event_id":"sha256:db54bb58755c7f81ef0d9e71382398dd485a50a929fdab1d0e3c71ce916cfad4","target":"graph","created_at":"2026-05-18T00:20:07Z","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 this paper, we propose new coupled codes constructed by overlapping circular spatially-coupled low-density parity-check (SC-LDPC) codes, which show better asymptotic and finite-length decoding performance compared to the conventional SC-LDPC codes. The performance improvement comes from the property that the proposed codes effectively split into two separated SC-LDPC codes with shorter chain length during the decoding process. We verify that the property of the proposed codes is valid in asymptotic setting via analysis tools such as the density evolution and the expected graph evolution. Ex","authors_text":"Bohwan Jun, Dong-Joon Shin, Heeyoul Kwak, Jong-Seon No, Pilwoong Yang","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-02-04T07:57:14Z","title":"New Coupled Codes Constructed by Overlapping Circular SC-LDPC Codes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.01577","kind":"arxiv","version":4},"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:e98e0fbfa2f716247a7163f358cf45634e01690b6148c2dcd1e9951ab80245f5","target":"record","created_at":"2026-05-18T00:20:07Z","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":"9d76a08ba93c79bae7ccc2116a175c2a882792dc9beb6ce907175caaf79d8513","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-02-04T07:57:14Z","title_canon_sha256":"0c6b1deba84a8cbb34c70bbb66fbf5af6a5f6bfb8917312703b03a045f8424c6"},"schema_version":"1.0","source":{"id":"1602.01577","kind":"arxiv","version":4}},"canonical_sha256":"e5347733b39d56cb3f7701fed28328a54734629f1ba5c5b30c003d65a4bd3e1d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e5347733b39d56cb3f7701fed28328a54734629f1ba5c5b30c003d65a4bd3e1d","first_computed_at":"2026-05-18T00:20:07.648662Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:20:07.648662Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"iznKPP3s8aL91E5AoehptJH31mjzd7Y1QV5LDzS+/k5lPBfMWUuEaWil83Hbi+qSBE8ffvClC+hm9NpbRKEGBg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:20:07.649345Z","signed_message":"canonical_sha256_bytes"},"source_id":"1602.01577","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e98e0fbfa2f716247a7163f358cf45634e01690b6148c2dcd1e9951ab80245f5","sha256:db54bb58755c7f81ef0d9e71382398dd485a50a929fdab1d0e3c71ce916cfad4"],"state_sha256":"1592b4e47c7c4e417d8269d90e72887276d82e63c91fd4133dd383fe727ac98f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uETrgHbSmQzJ2Nm2SwfXMqsO1ZRowOoa+7SfPBPe876n9pYO4scp/Xj0mxMEOs0biEwtaTh77nfrngrhQkk3BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T14:38:44.418530Z","bundle_sha256":"fe9efd6105fb0227d3b6249a082b8d8579fcce714806501859d5d236b680735b"}}