{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:CZ7PIMSBYZJDWEG2PHG4SF2XZW","short_pith_number":"pith:CZ7PIMSB","canonical_record":{"source":{"id":"2606.02163","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.AI","submitted_at":"2026-06-01T12:24:43Z","cross_cats_sorted":[],"title_canon_sha256":"ae54b31437f3f9ebbe1812c4c3a4935b981264516522a3f44401468b2f7319e7","abstract_canon_sha256":"2e92b3f3982ac087f0060b39974e5abf817855f39467a5ad15b81f5eb5309dd1"},"schema_version":"1.0"},"canonical_sha256":"167ef43241c6523b10da79cdc91757cdb4e4bff58d0b96aac15003be21ef2b17","source":{"kind":"arxiv","id":"2606.02163","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.02163","created_at":"2026-06-02T03:04:51Z"},{"alias_kind":"arxiv_version","alias_value":"2606.02163v1","created_at":"2026-06-02T03:04:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.02163","created_at":"2026-06-02T03:04:51Z"},{"alias_kind":"pith_short_12","alias_value":"CZ7PIMSBYZJD","created_at":"2026-06-02T03:04:51Z"},{"alias_kind":"pith_short_16","alias_value":"CZ7PIMSBYZJDWEG2","created_at":"2026-06-02T03:04:51Z"},{"alias_kind":"pith_short_8","alias_value":"CZ7PIMSB","created_at":"2026-06-02T03:04:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:CZ7PIMSBYZJDWEG2PHG4SF2XZW","target":"record","payload":{"canonical_record":{"source":{"id":"2606.02163","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.AI","submitted_at":"2026-06-01T12:24:43Z","cross_cats_sorted":[],"title_canon_sha256":"ae54b31437f3f9ebbe1812c4c3a4935b981264516522a3f44401468b2f7319e7","abstract_canon_sha256":"2e92b3f3982ac087f0060b39974e5abf817855f39467a5ad15b81f5eb5309dd1"},"schema_version":"1.0"},"canonical_sha256":"167ef43241c6523b10da79cdc91757cdb4e4bff58d0b96aac15003be21ef2b17","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-02T03:04:51.961474Z","signature_b64":"fhGMk6VXQI5rRAJQIHcX8wnpYIi+eTc/RPDwO2omXV9TBl+JxV/N0tcfrCERh8YzWh2duc8XdZjypTYTcrHUDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"167ef43241c6523b10da79cdc91757cdb4e4bff58d0b96aac15003be21ef2b17","last_reissued_at":"2026-06-02T03:04:51.961012Z","signature_status":"signed_v1","first_computed_at":"2026-06-02T03:04:51.961012Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.02163","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":"2026-06-02T03:04:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"houbOY9DJ7f1udMfxbMuKaghyU9xGuhMmiIa26Q4mzsyO+gDPH+CtP6felp422mOumzgXZt0/rl/PCTufKo8Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T20:13:39.427953Z"},"content_sha256":"dae1835a1cbf38557571d8af476a1e9c47a2ca449e8ac3e57caad351b88dbb6e","schema_version":"1.0","event_id":"sha256:dae1835a1cbf38557571d8af476a1e9c47a2ca449e8ac3e57caad351b88dbb6e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:CZ7PIMSBYZJDWEG2PHG4SF2XZW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An Abstract Worlds Semantic Framework for Belief Change Operators","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cs.AI","authors_text":"Daniel Grimaldi, M. Vanina Martinez, Ricardo O. Rodriguez","submitted_at":"2026-06-01T12:24:43Z","abstract_excerpt":"This article proposes a set-theoretic framework for belief change, called Abstract Worlds Semantics, in which no logical syntax is assumed. Inspired by Grove's (1988) results, our approach treats worlds as primitive elements, over which world contraction and world revision operators are defined. This semantic framework enables a unified analysis of belief change models. Within this framework, we unify classical and non-prioritized belief change constructions by defining versatile operators. When classical propositional logic is considered, our framework provides a homogeneous account of AGM, K"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.02163","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/2606.02163/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":"2026-06-02T03:04:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oyR8AWLF//6kZcq3c+mW0o4QDILrmfYY3PDwQY9Pf/fw20mEMmH8U9T3y9es4l3HCy+QD1BjEBDgI4bm5GZyAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T20:13:39.428738Z"},"content_sha256":"ccd1ba8432d9766d2f5d38793e5fa7678b57ed7edc287f91682766edf08f44ba","schema_version":"1.0","event_id":"sha256:ccd1ba8432d9766d2f5d38793e5fa7678b57ed7edc287f91682766edf08f44ba"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CZ7PIMSBYZJDWEG2PHG4SF2XZW/bundle.json","state_url":"https://pith.science/pith/CZ7PIMSBYZJDWEG2PHG4SF2XZW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CZ7PIMSBYZJDWEG2PHG4SF2XZW/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":"2026-06-08T20:13:39Z","links":{"resolver":"https://pith.science/pith/CZ7PIMSBYZJDWEG2PHG4SF2XZW","bundle":"https://pith.science/pith/CZ7PIMSBYZJDWEG2PHG4SF2XZW/bundle.json","state":"https://pith.science/pith/CZ7PIMSBYZJDWEG2PHG4SF2XZW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CZ7PIMSBYZJDWEG2PHG4SF2XZW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:CZ7PIMSBYZJDWEG2PHG4SF2XZW","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":"2e92b3f3982ac087f0060b39974e5abf817855f39467a5ad15b81f5eb5309dd1","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.AI","submitted_at":"2026-06-01T12:24:43Z","title_canon_sha256":"ae54b31437f3f9ebbe1812c4c3a4935b981264516522a3f44401468b2f7319e7"},"schema_version":"1.0","source":{"id":"2606.02163","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.02163","created_at":"2026-06-02T03:04:51Z"},{"alias_kind":"arxiv_version","alias_value":"2606.02163v1","created_at":"2026-06-02T03:04:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.02163","created_at":"2026-06-02T03:04:51Z"},{"alias_kind":"pith_short_12","alias_value":"CZ7PIMSBYZJD","created_at":"2026-06-02T03:04:51Z"},{"alias_kind":"pith_short_16","alias_value":"CZ7PIMSBYZJDWEG2","created_at":"2026-06-02T03:04:51Z"},{"alias_kind":"pith_short_8","alias_value":"CZ7PIMSB","created_at":"2026-06-02T03:04:51Z"}],"graph_snapshots":[{"event_id":"sha256:ccd1ba8432d9766d2f5d38793e5fa7678b57ed7edc287f91682766edf08f44ba","target":"graph","created_at":"2026-06-02T03:04:51Z","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/2606.02163/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This article proposes a set-theoretic framework for belief change, called Abstract Worlds Semantics, in which no logical syntax is assumed. Inspired by Grove's (1988) results, our approach treats worlds as primitive elements, over which world contraction and world revision operators are defined. This semantic framework enables a unified analysis of belief change models. Within this framework, we unify classical and non-prioritized belief change constructions by defining versatile operators. When classical propositional logic is considered, our framework provides a homogeneous account of AGM, K","authors_text":"Daniel Grimaldi, M. Vanina Martinez, Ricardo O. Rodriguez","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.AI","submitted_at":"2026-06-01T12:24:43Z","title":"An Abstract Worlds Semantic Framework for Belief Change Operators"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.02163","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:dae1835a1cbf38557571d8af476a1e9c47a2ca449e8ac3e57caad351b88dbb6e","target":"record","created_at":"2026-06-02T03:04:51Z","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":"2e92b3f3982ac087f0060b39974e5abf817855f39467a5ad15b81f5eb5309dd1","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.AI","submitted_at":"2026-06-01T12:24:43Z","title_canon_sha256":"ae54b31437f3f9ebbe1812c4c3a4935b981264516522a3f44401468b2f7319e7"},"schema_version":"1.0","source":{"id":"2606.02163","kind":"arxiv","version":1}},"canonical_sha256":"167ef43241c6523b10da79cdc91757cdb4e4bff58d0b96aac15003be21ef2b17","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"167ef43241c6523b10da79cdc91757cdb4e4bff58d0b96aac15003be21ef2b17","first_computed_at":"2026-06-02T03:04:51.961012Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-02T03:04:51.961012Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fhGMk6VXQI5rRAJQIHcX8wnpYIi+eTc/RPDwO2omXV9TBl+JxV/N0tcfrCERh8YzWh2duc8XdZjypTYTcrHUDw==","signature_status":"signed_v1","signed_at":"2026-06-02T03:04:51.961474Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.02163","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dae1835a1cbf38557571d8af476a1e9c47a2ca449e8ac3e57caad351b88dbb6e","sha256:ccd1ba8432d9766d2f5d38793e5fa7678b57ed7edc287f91682766edf08f44ba"],"state_sha256":"d0a49e6249420fbee38387e41642227c7333d9817d0051f04b8d26bda508e186"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+aBuz/WHnIEdomUehCQ4qAZgE5LhDHbg2W9JEFRvB2vzaIzsETxh/WLfN1htkpoAAj42/qhjueMM9Ah/T6tVCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T20:13:39.433505Z","bundle_sha256":"c1e566cfa1f57b5e4b13a71fedba0658c83bbf67bf3beba8ea7b5f69671746f7"}}