{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:YRY22QXFRER5TI667DZUM24SEN","short_pith_number":"pith:YRY22QXF","canonical_record":{"source":{"id":"1303.0044","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LO","submitted_at":"2013-02-28T23:27:41Z","cross_cats_sorted":["cs.FL"],"title_canon_sha256":"d8b1d3cf4b46f96bddc807fd3628fde9d59084e5cd979d0391ddc18f68f84b81","abstract_canon_sha256":"a50522824369d4f9a6019005dd91bb0322a685f3d4d80ff4a526dab661bfa17f"},"schema_version":"1.0"},"canonical_sha256":"c471ad42e58923d9a3def8f3466b92235478cc94c4a600d9b08ba26315b1228e","source":{"kind":"arxiv","id":"1303.0044","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1303.0044","created_at":"2026-05-18T03:28:04Z"},{"alias_kind":"arxiv_version","alias_value":"1303.0044v3","created_at":"2026-05-18T03:28:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.0044","created_at":"2026-05-18T03:28:04Z"},{"alias_kind":"pith_short_12","alias_value":"YRY22QXFRER5","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_16","alias_value":"YRY22QXFRER5TI66","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_8","alias_value":"YRY22QXF","created_at":"2026-05-18T12:28:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:YRY22QXFRER5TI667DZUM24SEN","target":"record","payload":{"canonical_record":{"source":{"id":"1303.0044","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LO","submitted_at":"2013-02-28T23:27:41Z","cross_cats_sorted":["cs.FL"],"title_canon_sha256":"d8b1d3cf4b46f96bddc807fd3628fde9d59084e5cd979d0391ddc18f68f84b81","abstract_canon_sha256":"a50522824369d4f9a6019005dd91bb0322a685f3d4d80ff4a526dab661bfa17f"},"schema_version":"1.0"},"canonical_sha256":"c471ad42e58923d9a3def8f3466b92235478cc94c4a600d9b08ba26315b1228e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:28:04.875392Z","signature_b64":"12242Qv6XJZt2YoBRjM05ytOsBLPr9zm7Pim0tsHspAX0kq+T0QjLcZHAW+2IGk/qb0BgeeNLO8nMxj7XH/FAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c471ad42e58923d9a3def8f3466b92235478cc94c4a600d9b08ba26315b1228e","last_reissued_at":"2026-05-18T03:28:04.874568Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:28:04.874568Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1303.0044","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:28:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q8F1KEH8RMnADDIN2HdA3s1FKLzPtyuJVYvgrhNh/QvLp26xX8WV+sgNl7j4hBdrU/qW1/txLnxhqgH7ABZZDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T02:29:50.039360Z"},"content_sha256":"db1587d64e7da9375cbb32994474ab9762f30a3ec1c8c2e3f0ba0c1be3616ffd","schema_version":"1.0","event_id":"sha256:db1587d64e7da9375cbb32994474ab9762f30a3ec1c8c2e3f0ba0c1be3616ffd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:YRY22QXFRER5TI667DZUM24SEN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A connection between concurrency and language theory","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.FL"],"primary_cat":"cs.LO","authors_text":"Zoltan Esik","submitted_at":"2013-02-28T23:27:41Z","abstract_excerpt":"We show that three fixed point structures equipped with (sequential) composition, a sum operation, and a fixed point operation share the same valid equations. These are the theories of (context-free) languages, (regular) tree languages, and simulation equivalence classes of (regular) synchronization trees (or processes). The results reveal a close relationship between classical language theory and process algebra."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.0044","kind":"arxiv","version":3},"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":"2026-05-18T03:28:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dybQLCoBOqETkSHxuIEAhZ6fQT/FKtvoHf+jIAT64CQv68VnUsX5D/9KQoTtIgnSPv1kCbjssX95gQhXwnHADw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T02:29:50.039705Z"},"content_sha256":"e8570736dc0bfd312018739c8f47e9fa5ad1d4743953c57806e527f39570d5e6","schema_version":"1.0","event_id":"sha256:e8570736dc0bfd312018739c8f47e9fa5ad1d4743953c57806e527f39570d5e6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YRY22QXFRER5TI667DZUM24SEN/bundle.json","state_url":"https://pith.science/pith/YRY22QXFRER5TI667DZUM24SEN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YRY22QXFRER5TI667DZUM24SEN/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":"2026-06-24T02:29:50Z","links":{"resolver":"https://pith.science/pith/YRY22QXFRER5TI667DZUM24SEN","bundle":"https://pith.science/pith/YRY22QXFRER5TI667DZUM24SEN/bundle.json","state":"https://pith.science/pith/YRY22QXFRER5TI667DZUM24SEN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YRY22QXFRER5TI667DZUM24SEN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:YRY22QXFRER5TI667DZUM24SEN","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":"a50522824369d4f9a6019005dd91bb0322a685f3d4d80ff4a526dab661bfa17f","cross_cats_sorted":["cs.FL"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LO","submitted_at":"2013-02-28T23:27:41Z","title_canon_sha256":"d8b1d3cf4b46f96bddc807fd3628fde9d59084e5cd979d0391ddc18f68f84b81"},"schema_version":"1.0","source":{"id":"1303.0044","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1303.0044","created_at":"2026-05-18T03:28:04Z"},{"alias_kind":"arxiv_version","alias_value":"1303.0044v3","created_at":"2026-05-18T03:28:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.0044","created_at":"2026-05-18T03:28:04Z"},{"alias_kind":"pith_short_12","alias_value":"YRY22QXFRER5","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_16","alias_value":"YRY22QXFRER5TI66","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_8","alias_value":"YRY22QXF","created_at":"2026-05-18T12:28:09Z"}],"graph_snapshots":[{"event_id":"sha256:e8570736dc0bfd312018739c8f47e9fa5ad1d4743953c57806e527f39570d5e6","target":"graph","created_at":"2026-05-18T03:28:04Z","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 show that three fixed point structures equipped with (sequential) composition, a sum operation, and a fixed point operation share the same valid equations. These are the theories of (context-free) languages, (regular) tree languages, and simulation equivalence classes of (regular) synchronization trees (or processes). The results reveal a close relationship between classical language theory and process algebra.","authors_text":"Zoltan Esik","cross_cats":["cs.FL"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LO","submitted_at":"2013-02-28T23:27:41Z","title":"A connection between concurrency and language theory"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.0044","kind":"arxiv","version":3},"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:db1587d64e7da9375cbb32994474ab9762f30a3ec1c8c2e3f0ba0c1be3616ffd","target":"record","created_at":"2026-05-18T03:28:04Z","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":"a50522824369d4f9a6019005dd91bb0322a685f3d4d80ff4a526dab661bfa17f","cross_cats_sorted":["cs.FL"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LO","submitted_at":"2013-02-28T23:27:41Z","title_canon_sha256":"d8b1d3cf4b46f96bddc807fd3628fde9d59084e5cd979d0391ddc18f68f84b81"},"schema_version":"1.0","source":{"id":"1303.0044","kind":"arxiv","version":3}},"canonical_sha256":"c471ad42e58923d9a3def8f3466b92235478cc94c4a600d9b08ba26315b1228e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c471ad42e58923d9a3def8f3466b92235478cc94c4a600d9b08ba26315b1228e","first_computed_at":"2026-05-18T03:28:04.874568Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:28:04.874568Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"12242Qv6XJZt2YoBRjM05ytOsBLPr9zm7Pim0tsHspAX0kq+T0QjLcZHAW+2IGk/qb0BgeeNLO8nMxj7XH/FAg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:28:04.875392Z","signed_message":"canonical_sha256_bytes"},"source_id":"1303.0044","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:db1587d64e7da9375cbb32994474ab9762f30a3ec1c8c2e3f0ba0c1be3616ffd","sha256:e8570736dc0bfd312018739c8f47e9fa5ad1d4743953c57806e527f39570d5e6"],"state_sha256":"2f6c57626b92187a1bc95c5cd2b3d6517d3d85a72417e6d4a5ea31eac4be1f0d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NUOBDayjuMXNS2AcnLSy4j9pbGmw17cpiZa5jGy5PxG2TpZqHgufsXk+T2MRYAhMQBcxEtQ9oKireL/47xhuAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-24T02:29:50.043060Z","bundle_sha256":"a6909589e68a1b2fd63450922ba1bd1f7d7510d8132b248eeb79fb1e68d4afce"}}