{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:4AMOBVRHKOUG7RUVFXOAG5ZGVS","short_pith_number":"pith:4AMOBVRH","canonical_record":{"source":{"id":"2506.04839","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2025-06-05T10:00:53Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"ac6aedb949cc1f3dc102d6e762c72a4f4effded2d266c8a4718d305910327b30","abstract_canon_sha256":"8e9365e70eb777f684cfd65659540ee2a2159f8295ee47ca70898f95dba70c61"},"schema_version":"1.0"},"canonical_sha256":"e018e0d62753a86fc6952ddc037726acbc07ee698e9da0ff07e85757fb417e02","source":{"kind":"arxiv","id":"2506.04839","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2506.04839","created_at":"2026-07-05T11:16:37Z"},{"alias_kind":"arxiv_version","alias_value":"2506.04839v1","created_at":"2026-07-05T11:16:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.04839","created_at":"2026-07-05T11:16:37Z"},{"alias_kind":"pith_short_12","alias_value":"4AMOBVRHKOUG","created_at":"2026-07-05T11:16:37Z"},{"alias_kind":"pith_short_16","alias_value":"4AMOBVRHKOUG7RUV","created_at":"2026-07-05T11:16:37Z"},{"alias_kind":"pith_short_8","alias_value":"4AMOBVRH","created_at":"2026-07-05T11:16:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:4AMOBVRHKOUG7RUVFXOAG5ZGVS","target":"record","payload":{"canonical_record":{"source":{"id":"2506.04839","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2025-06-05T10:00:53Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"ac6aedb949cc1f3dc102d6e762c72a4f4effded2d266c8a4718d305910327b30","abstract_canon_sha256":"8e9365e70eb777f684cfd65659540ee2a2159f8295ee47ca70898f95dba70c61"},"schema_version":"1.0"},"canonical_sha256":"e018e0d62753a86fc6952ddc037726acbc07ee698e9da0ff07e85757fb417e02","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:16:37.605854Z","signature_b64":"SBCpe+d3kJO5+mVjzBsTMK/H35ABfBA8y88u3W6opD7wJHnaNt+0BhAbEk+SCl9eWxnHkEIWKNrwEWm3fU8wDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e018e0d62753a86fc6952ddc037726acbc07ee698e9da0ff07e85757fb417e02","last_reissued_at":"2026-07-05T11:16:37.605397Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:16:37.605397Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2506.04839","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T11:16:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hxuMXJF57YJqtJkwa3dPZiJBYp4d3Jqq1bBLw50hZUy3MVvGGjFMkGF8K2pmRznx7JAGmTJEf7EsQR5nZSnSBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T06:25:22.455315Z"},"content_sha256":"c8aca3ca128fce29187c3fd1c774436dbeb00a47b78ae71da96e196d62ab4552","schema_version":"1.0","event_id":"sha256:c8aca3ca128fce29187c3fd1c774436dbeb00a47b78ae71da96e196d62ab4552"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:4AMOBVRHKOUG7RUVFXOAG5ZGVS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Iterative Neural Rollback Chase-Pyndiah Decoding","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Alexey Frolov, Dmitry Artemasov, Kirill Andreev, Oleg Nesterenkov, Pavel Rybin","submitted_at":"2025-06-05T10:00:53Z","abstract_excerpt":"Iterative decoding is essential in modern communication systems, especially optical communications, where error-correcting codes such as turbo product codes (TPC) and staircase codes are widely employed. A key factor in achieving high error correction performance is the use of soft-decision decoding for component codes. However, implementing optimal maximum a posteriori (MAP) probability decoding for commonly used component codes, such as BCH and Polar codes, is computationally prohibitive. Instead, practical systems rely on approximations, with the Chase-Pyndiah algorithm being a widely used "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.04839","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2506.04839/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T11:16:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XjGTFnVAQwPXDruPE26z5G2UB2uiJwGaE5i5geXFW+UiEQ72+4dIeLNKVrIk3LTc5CF+N0ZYD1ARej/E0ktbCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T06:25:22.455819Z"},"content_sha256":"1b486033507921ef8e061c5527af0edce66b66da726ce199ee725c05bc7d6d8e","schema_version":"1.0","event_id":"sha256:1b486033507921ef8e061c5527af0edce66b66da726ce199ee725c05bc7d6d8e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4AMOBVRHKOUG7RUVFXOAG5ZGVS/bundle.json","state_url":"https://pith.science/pith/4AMOBVRHKOUG7RUVFXOAG5ZGVS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4AMOBVRHKOUG7RUVFXOAG5ZGVS/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":"2026-08-08T06:25:22Z","links":{"resolver":"https://pith.science/pith/4AMOBVRHKOUG7RUVFXOAG5ZGVS","bundle":"https://pith.science/pith/4AMOBVRHKOUG7RUVFXOAG5ZGVS/bundle.json","state":"https://pith.science/pith/4AMOBVRHKOUG7RUVFXOAG5ZGVS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4AMOBVRHKOUG7RUVFXOAG5ZGVS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:4AMOBVRHKOUG7RUVFXOAG5ZGVS","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":"8e9365e70eb777f684cfd65659540ee2a2159f8295ee47ca70898f95dba70c61","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2025-06-05T10:00:53Z","title_canon_sha256":"ac6aedb949cc1f3dc102d6e762c72a4f4effded2d266c8a4718d305910327b30"},"schema_version":"1.0","source":{"id":"2506.04839","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2506.04839","created_at":"2026-07-05T11:16:37Z"},{"alias_kind":"arxiv_version","alias_value":"2506.04839v1","created_at":"2026-07-05T11:16:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.04839","created_at":"2026-07-05T11:16:37Z"},{"alias_kind":"pith_short_12","alias_value":"4AMOBVRHKOUG","created_at":"2026-07-05T11:16:37Z"},{"alias_kind":"pith_short_16","alias_value":"4AMOBVRHKOUG7RUV","created_at":"2026-07-05T11:16:37Z"},{"alias_kind":"pith_short_8","alias_value":"4AMOBVRH","created_at":"2026-07-05T11:16:37Z"}],"graph_snapshots":[{"event_id":"sha256:1b486033507921ef8e061c5527af0edce66b66da726ce199ee725c05bc7d6d8e","target":"graph","created_at":"2026-07-05T11:16:37Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2506.04839/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Iterative decoding is essential in modern communication systems, especially optical communications, where error-correcting codes such as turbo product codes (TPC) and staircase codes are widely employed. A key factor in achieving high error correction performance is the use of soft-decision decoding for component codes. However, implementing optimal maximum a posteriori (MAP) probability decoding for commonly used component codes, such as BCH and Polar codes, is computationally prohibitive. Instead, practical systems rely on approximations, with the Chase-Pyndiah algorithm being a widely used ","authors_text":"Alexey Frolov, Dmitry Artemasov, Kirill Andreev, Oleg Nesterenkov, Pavel Rybin","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2025-06-05T10:00:53Z","title":"Iterative Neural Rollback Chase-Pyndiah Decoding"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.04839","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:c8aca3ca128fce29187c3fd1c774436dbeb00a47b78ae71da96e196d62ab4552","target":"record","created_at":"2026-07-05T11:16:37Z","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":"8e9365e70eb777f684cfd65659540ee2a2159f8295ee47ca70898f95dba70c61","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2025-06-05T10:00:53Z","title_canon_sha256":"ac6aedb949cc1f3dc102d6e762c72a4f4effded2d266c8a4718d305910327b30"},"schema_version":"1.0","source":{"id":"2506.04839","kind":"arxiv","version":1}},"canonical_sha256":"e018e0d62753a86fc6952ddc037726acbc07ee698e9da0ff07e85757fb417e02","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e018e0d62753a86fc6952ddc037726acbc07ee698e9da0ff07e85757fb417e02","first_computed_at":"2026-07-05T11:16:37.605397Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:16:37.605397Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SBCpe+d3kJO5+mVjzBsTMK/H35ABfBA8y88u3W6opD7wJHnaNt+0BhAbEk+SCl9eWxnHkEIWKNrwEWm3fU8wDw==","signature_status":"signed_v1","signed_at":"2026-07-05T11:16:37.605854Z","signed_message":"canonical_sha256_bytes"},"source_id":"2506.04839","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c8aca3ca128fce29187c3fd1c774436dbeb00a47b78ae71da96e196d62ab4552","sha256:1b486033507921ef8e061c5527af0edce66b66da726ce199ee725c05bc7d6d8e"],"state_sha256":"075127da649cb17c2aa80f84a51554e53fdfb0e740e344509ff0d7f1beb0a90e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JCbTb+vyV4Eg8LQTDkluxbLtAcclVgdMubDnqD+luWmqOzl0nQXbcCsTm+AK3046VXGGGhdbIJ0rzujz0sD/Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-08T06:25:22.459574Z","bundle_sha256":"60b1eced55f9ea7a045cc75c16430ab3d1e56ced0ca2c8f57452e0667a2738ee"}}