{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:O3SN5LU5FKXLT3AR74XDJZQ7U6","short_pith_number":"pith:O3SN5LU5","canonical_record":{"source":{"id":"1108.4470","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LO","submitted_at":"2011-08-23T01:23:54Z","cross_cats_sorted":[],"title_canon_sha256":"a787ca52327c598431510e2c24c3dfe0d9886ff1cdd3fffb7b92bafd3fd00aee","abstract_canon_sha256":"c5300335cbe0a8db788ac89f905dbbed928598429dd74c7509dafa239cb1082a"},"schema_version":"1.0"},"canonical_sha256":"76e4deae9d2aaeb9ec11ff2e34e61fa787829bf4fdf7ac1c3fd23301959d440f","source":{"kind":"arxiv","id":"1108.4470","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1108.4470","created_at":"2026-05-18T04:14:54Z"},{"alias_kind":"arxiv_version","alias_value":"1108.4470v1","created_at":"2026-05-18T04:14:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1108.4470","created_at":"2026-05-18T04:14:54Z"},{"alias_kind":"pith_short_12","alias_value":"O3SN5LU5FKXL","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_16","alias_value":"O3SN5LU5FKXLT3AR","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_8","alias_value":"O3SN5LU5","created_at":"2026-05-18T12:26:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:O3SN5LU5FKXLT3AR74XDJZQ7U6","target":"record","payload":{"canonical_record":{"source":{"id":"1108.4470","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LO","submitted_at":"2011-08-23T01:23:54Z","cross_cats_sorted":[],"title_canon_sha256":"a787ca52327c598431510e2c24c3dfe0d9886ff1cdd3fffb7b92bafd3fd00aee","abstract_canon_sha256":"c5300335cbe0a8db788ac89f905dbbed928598429dd74c7509dafa239cb1082a"},"schema_version":"1.0"},"canonical_sha256":"76e4deae9d2aaeb9ec11ff2e34e61fa787829bf4fdf7ac1c3fd23301959d440f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:14:54.527607Z","signature_b64":"sbZGTXRXXIq6YXHzyXkRZmoL1MZWcEgarPJ8rOVl/ZMPm23k57iMHCvBPKtTgVvQvEzAONrnUrCp4n/QnB4JCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"76e4deae9d2aaeb9ec11ff2e34e61fa787829bf4fdf7ac1c3fd23301959d440f","last_reissued_at":"2026-05-18T04:14:54.526933Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:14:54.526933Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1108.4470","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":"2026-05-18T04:14:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oIRM8ISIny/gHsvrIh/jTPJ4Q/grValqvvJ4FXfLMumtTY0NDKGEJXtjOLcUMACnOg+KwCZrRRioRZQHuvMFCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T15:40:08.546342Z"},"content_sha256":"f33c840355a671a2a8651b07354672627ef601b97fc0884b747678c0403dae33","schema_version":"1.0","event_id":"sha256:f33c840355a671a2a8651b07354672627ef601b97fc0884b747678c0403dae33"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:O3SN5LU5FKXLT3AR74XDJZQ7U6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Logic with Reverse Modalities for History-preserving Bisimulations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.LO","authors_text":"Iain Phillips (Imperial College London), Irek Ulidowski (University of Leicester)","submitted_at":"2011-08-23T01:23:54Z","abstract_excerpt":"We introduce event identifier logic (EIL) which extends Hennessy-Milner logic by the addition of (1) reverse as well as forward modalities, and (2) identifiers to keep track of events. We show that this logic corresponds to hereditary history-preserving (HH) bisimulation equivalence within a particular true-concurrency model, namely stable configuration structures. We furthermore show how natural sublogics of EIL correspond to coarser equivalences. In particular we provide logical characterisations of weak history-preserving (WH) and history-preserving (H) bisimulation. Logics corresponding to"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1108.4470","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:14:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9k+6oXAbPQ+vuozT0pRnm8MNeL8vzBtens73dqUugl0PzG69/MDVlhnceZ/CmjWDQkwf0CQg5E7XlkHDd8D8Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T15:40:08.546681Z"},"content_sha256":"35773ab56d24e9e263c786e3f1c9bc37e8f6dc38f2718b4aa228d56717ba1a3d","schema_version":"1.0","event_id":"sha256:35773ab56d24e9e263c786e3f1c9bc37e8f6dc38f2718b4aa228d56717ba1a3d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/O3SN5LU5FKXLT3AR74XDJZQ7U6/bundle.json","state_url":"https://pith.science/pith/O3SN5LU5FKXLT3AR74XDJZQ7U6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/O3SN5LU5FKXLT3AR74XDJZQ7U6/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":"2026-06-26T15:40:08Z","links":{"resolver":"https://pith.science/pith/O3SN5LU5FKXLT3AR74XDJZQ7U6","bundle":"https://pith.science/pith/O3SN5LU5FKXLT3AR74XDJZQ7U6/bundle.json","state":"https://pith.science/pith/O3SN5LU5FKXLT3AR74XDJZQ7U6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/O3SN5LU5FKXLT3AR74XDJZQ7U6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:O3SN5LU5FKXLT3AR74XDJZQ7U6","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":"c5300335cbe0a8db788ac89f905dbbed928598429dd74c7509dafa239cb1082a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LO","submitted_at":"2011-08-23T01:23:54Z","title_canon_sha256":"a787ca52327c598431510e2c24c3dfe0d9886ff1cdd3fffb7b92bafd3fd00aee"},"schema_version":"1.0","source":{"id":"1108.4470","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1108.4470","created_at":"2026-05-18T04:14:54Z"},{"alias_kind":"arxiv_version","alias_value":"1108.4470v1","created_at":"2026-05-18T04:14:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1108.4470","created_at":"2026-05-18T04:14:54Z"},{"alias_kind":"pith_short_12","alias_value":"O3SN5LU5FKXL","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_16","alias_value":"O3SN5LU5FKXLT3AR","created_at":"2026-05-18T12:26:37Z"},{"alias_kind":"pith_short_8","alias_value":"O3SN5LU5","created_at":"2026-05-18T12:26:37Z"}],"graph_snapshots":[{"event_id":"sha256:35773ab56d24e9e263c786e3f1c9bc37e8f6dc38f2718b4aa228d56717ba1a3d","target":"graph","created_at":"2026-05-18T04:14:54Z","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 introduce event identifier logic (EIL) which extends Hennessy-Milner logic by the addition of (1) reverse as well as forward modalities, and (2) identifiers to keep track of events. We show that this logic corresponds to hereditary history-preserving (HH) bisimulation equivalence within a particular true-concurrency model, namely stable configuration structures. We furthermore show how natural sublogics of EIL correspond to coarser equivalences. In particular we provide logical characterisations of weak history-preserving (WH) and history-preserving (H) bisimulation. Logics corresponding to","authors_text":"Iain Phillips (Imperial College London), Irek Ulidowski (University of Leicester)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LO","submitted_at":"2011-08-23T01:23:54Z","title":"A Logic with Reverse Modalities for History-preserving Bisimulations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1108.4470","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:f33c840355a671a2a8651b07354672627ef601b97fc0884b747678c0403dae33","target":"record","created_at":"2026-05-18T04:14:54Z","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":"c5300335cbe0a8db788ac89f905dbbed928598429dd74c7509dafa239cb1082a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LO","submitted_at":"2011-08-23T01:23:54Z","title_canon_sha256":"a787ca52327c598431510e2c24c3dfe0d9886ff1cdd3fffb7b92bafd3fd00aee"},"schema_version":"1.0","source":{"id":"1108.4470","kind":"arxiv","version":1}},"canonical_sha256":"76e4deae9d2aaeb9ec11ff2e34e61fa787829bf4fdf7ac1c3fd23301959d440f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"76e4deae9d2aaeb9ec11ff2e34e61fa787829bf4fdf7ac1c3fd23301959d440f","first_computed_at":"2026-05-18T04:14:54.526933Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:14:54.526933Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"sbZGTXRXXIq6YXHzyXkRZmoL1MZWcEgarPJ8rOVl/ZMPm23k57iMHCvBPKtTgVvQvEzAONrnUrCp4n/QnB4JCg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:14:54.527607Z","signed_message":"canonical_sha256_bytes"},"source_id":"1108.4470","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f33c840355a671a2a8651b07354672627ef601b97fc0884b747678c0403dae33","sha256:35773ab56d24e9e263c786e3f1c9bc37e8f6dc38f2718b4aa228d56717ba1a3d"],"state_sha256":"df96639b3dbc8a7a4ad8360e4dcd0ff71df64f7a4fe498fa8e4f14aabddac5db"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zhzZSekTaH2tT8r37GNbvmmG+o1/g9uSu5WDiWGUE1OxDs35sa9HKwhSml5QyPce0SLbxS1k5apuZOpVpJQtDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-26T15:40:08.548530Z","bundle_sha256":"8930509e0e6389d9bf13fbfa30e344c9b25cb748f28f8e0d5550197806f37529"}}