{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:XVWFCTT5YZ5H77KQN6FD3NANT2","short_pith_number":"pith:XVWFCTT5","canonical_record":{"source":{"id":"1509.08605","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2015-09-29T06:38:40Z","cross_cats_sorted":["cs.LO"],"title_canon_sha256":"d5a10cfbc82f539c26b270f9c863c763edf00b760b69882bd7e85a6a65cd2fef","abstract_canon_sha256":"ec71ca620b6fb893e95ddbfbe2f185ae1dac2621c50ee41d2a7efc0956465f72"},"schema_version":"1.0"},"canonical_sha256":"bd6c514e7dc67a7ffd506f8a3db40d9e8a50561932147de78afa97c65511aec3","source":{"kind":"arxiv","id":"1509.08605","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.08605","created_at":"2026-05-18T01:23:08Z"},{"alias_kind":"arxiv_version","alias_value":"1509.08605v3","created_at":"2026-05-18T01:23:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.08605","created_at":"2026-05-18T01:23:08Z"},{"alias_kind":"pith_short_12","alias_value":"XVWFCTT5YZ5H","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_16","alias_value":"XVWFCTT5YZ5H77KQ","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_8","alias_value":"XVWFCTT5","created_at":"2026-05-18T12:29:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:XVWFCTT5YZ5H77KQN6FD3NANT2","target":"record","payload":{"canonical_record":{"source":{"id":"1509.08605","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2015-09-29T06:38:40Z","cross_cats_sorted":["cs.LO"],"title_canon_sha256":"d5a10cfbc82f539c26b270f9c863c763edf00b760b69882bd7e85a6a65cd2fef","abstract_canon_sha256":"ec71ca620b6fb893e95ddbfbe2f185ae1dac2621c50ee41d2a7efc0956465f72"},"schema_version":"1.0"},"canonical_sha256":"bd6c514e7dc67a7ffd506f8a3db40d9e8a50561932147de78afa97c65511aec3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:23:08.070166Z","signature_b64":"N0AO55sINA99OgOoffu59VqPXwbdwO5wu18XYW9BP2AvC5qZLM0ufxlyztq47UVyR9Qo1vB/OhXGRp7JenO+CA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bd6c514e7dc67a7ffd506f8a3db40d9e8a50561932147de78afa97c65511aec3","last_reissued_at":"2026-05-18T01:23:08.065662Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:23:08.065662Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1509.08605","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":"2026-05-18T01:23:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yinhv+CvQdRmYBMTC3uMyncqmdYqyqhu4lQn78TftU+qUnNGDRwCr8RWTmVOeF7f4lEWjOGk20THCyZ/ifRtAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T23:17:33.907115Z"},"content_sha256":"48cb0ef2d66cfa31c4e9581f012ebf5ecfbe6a94f8ea0ece104ed615699d87fe","schema_version":"1.0","event_id":"sha256:48cb0ef2d66cfa31c4e9581f012ebf5ecfbe6a94f8ea0ece104ed615699d87fe"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:XVWFCTT5YZ5H77KQN6FD3NANT2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Sound and Complete Hoare Logic for Dynamically-Typed, Object-Oriented Programs -- Extended Version --","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.LO"],"primary_cat":"cs.PL","authors_text":"Bj\\\"orn Engelmann, Ernst-R\\\"udiger Olderog","submitted_at":"2015-09-29T06:38:40Z","abstract_excerpt":"A simple dynamically-typed, (purely) object-oriented language is defined. A structural operational semantics as well as a Hoare-style program logic for reasoning about programs in the language in multiple notions of correctness are given. The Hoare logic is proved to be both sound and (relative) complete and is -- to the best of our knowledge -- the first such logic presented for a dynamically-typed language."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.08605","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":"2026-05-18T01:23:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zFrlUvGMsihSXs7SziwI2IeF0ViUdh5zaeyEbEek+JtyiYinIFxHNRg0wCTk2oPYNX1eiAjjwr3fZ+rUYfXFDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T23:17:33.907804Z"},"content_sha256":"e04d20b1b06c9011896b5a98588c97405006920974d694de93364501b8e3b68d","schema_version":"1.0","event_id":"sha256:e04d20b1b06c9011896b5a98588c97405006920974d694de93364501b8e3b68d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XVWFCTT5YZ5H77KQN6FD3NANT2/bundle.json","state_url":"https://pith.science/pith/XVWFCTT5YZ5H77KQN6FD3NANT2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XVWFCTT5YZ5H77KQN6FD3NANT2/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":"2026-05-26T23:17:33Z","links":{"resolver":"https://pith.science/pith/XVWFCTT5YZ5H77KQN6FD3NANT2","bundle":"https://pith.science/pith/XVWFCTT5YZ5H77KQN6FD3NANT2/bundle.json","state":"https://pith.science/pith/XVWFCTT5YZ5H77KQN6FD3NANT2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XVWFCTT5YZ5H77KQN6FD3NANT2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:XVWFCTT5YZ5H77KQN6FD3NANT2","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":"ec71ca620b6fb893e95ddbfbe2f185ae1dac2621c50ee41d2a7efc0956465f72","cross_cats_sorted":["cs.LO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2015-09-29T06:38:40Z","title_canon_sha256":"d5a10cfbc82f539c26b270f9c863c763edf00b760b69882bd7e85a6a65cd2fef"},"schema_version":"1.0","source":{"id":"1509.08605","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.08605","created_at":"2026-05-18T01:23:08Z"},{"alias_kind":"arxiv_version","alias_value":"1509.08605v3","created_at":"2026-05-18T01:23:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.08605","created_at":"2026-05-18T01:23:08Z"},{"alias_kind":"pith_short_12","alias_value":"XVWFCTT5YZ5H","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_16","alias_value":"XVWFCTT5YZ5H77KQ","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_8","alias_value":"XVWFCTT5","created_at":"2026-05-18T12:29:50Z"}],"graph_snapshots":[{"event_id":"sha256:e04d20b1b06c9011896b5a98588c97405006920974d694de93364501b8e3b68d","target":"graph","created_at":"2026-05-18T01:23:08Z","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":"A simple dynamically-typed, (purely) object-oriented language is defined. A structural operational semantics as well as a Hoare-style program logic for reasoning about programs in the language in multiple notions of correctness are given. The Hoare logic is proved to be both sound and (relative) complete and is -- to the best of our knowledge -- the first such logic presented for a dynamically-typed language.","authors_text":"Bj\\\"orn Engelmann, Ernst-R\\\"udiger Olderog","cross_cats":["cs.LO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2015-09-29T06:38:40Z","title":"A Sound and Complete Hoare Logic for Dynamically-Typed, Object-Oriented Programs -- Extended Version --"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.08605","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":"sha256:48cb0ef2d66cfa31c4e9581f012ebf5ecfbe6a94f8ea0ece104ed615699d87fe","target":"record","created_at":"2026-05-18T01:23:08Z","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":"ec71ca620b6fb893e95ddbfbe2f185ae1dac2621c50ee41d2a7efc0956465f72","cross_cats_sorted":["cs.LO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2015-09-29T06:38:40Z","title_canon_sha256":"d5a10cfbc82f539c26b270f9c863c763edf00b760b69882bd7e85a6a65cd2fef"},"schema_version":"1.0","source":{"id":"1509.08605","kind":"arxiv","version":3}},"canonical_sha256":"bd6c514e7dc67a7ffd506f8a3db40d9e8a50561932147de78afa97c65511aec3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bd6c514e7dc67a7ffd506f8a3db40d9e8a50561932147de78afa97c65511aec3","first_computed_at":"2026-05-18T01:23:08.065662Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:23:08.065662Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"N0AO55sINA99OgOoffu59VqPXwbdwO5wu18XYW9BP2AvC5qZLM0ufxlyztq47UVyR9Qo1vB/OhXGRp7JenO+CA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:23:08.070166Z","signed_message":"canonical_sha256_bytes"},"source_id":"1509.08605","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:48cb0ef2d66cfa31c4e9581f012ebf5ecfbe6a94f8ea0ece104ed615699d87fe","sha256:e04d20b1b06c9011896b5a98588c97405006920974d694de93364501b8e3b68d"],"state_sha256":"345aab5089fb7f19bfb0a3e75d15d53ef02f0f1f9f474c179989c97e79f40319"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0YjXaqdWxhwLiYUxkqCQ1fo0ayBwjMCJyEtF/CBT6ABWzZrqgt1z0TKtR3Az+TyIiUu5Bwx9lfl1roYMI4HuDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T23:17:33.911240Z","bundle_sha256":"5a37ad0bcb673ec19f129b0eaf93fcb23b658729c44ef41f69d107df8e803e83"}}