{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:5YMXDVJ6G5LPKQP5YITWXWFQJZ","short_pith_number":"pith:5YMXDVJ6","canonical_record":{"source":{"id":"0805.0783","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LO","submitted_at":"2008-05-06T19:27:14Z","cross_cats_sorted":[],"title_canon_sha256":"eb36cfee66445766ce8020d84784c0d90abb897b0e3a85a059f4523808ce5394","abstract_canon_sha256":"044b8fae7ff66006185a721ef96ed945022406138035547700a9dbf3890154ae"},"schema_version":"1.0"},"canonical_sha256":"ee1971d53e3756f541fdc2276bd8b04e6365fbd7f5146817013ada904a66bba3","source":{"kind":"arxiv","id":"0805.0783","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0805.0783","created_at":"2026-05-18T01:37:42Z"},{"alias_kind":"arxiv_version","alias_value":"0805.0783v2","created_at":"2026-05-18T01:37:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0805.0783","created_at":"2026-05-18T01:37:42Z"},{"alias_kind":"pith_short_12","alias_value":"5YMXDVJ6G5LP","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_16","alias_value":"5YMXDVJ6G5LPKQP5","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_8","alias_value":"5YMXDVJ6","created_at":"2026-05-18T12:25:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:5YMXDVJ6G5LPKQP5YITWXWFQJZ","target":"record","payload":{"canonical_record":{"source":{"id":"0805.0783","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LO","submitted_at":"2008-05-06T19:27:14Z","cross_cats_sorted":[],"title_canon_sha256":"eb36cfee66445766ce8020d84784c0d90abb897b0e3a85a059f4523808ce5394","abstract_canon_sha256":"044b8fae7ff66006185a721ef96ed945022406138035547700a9dbf3890154ae"},"schema_version":"1.0"},"canonical_sha256":"ee1971d53e3756f541fdc2276bd8b04e6365fbd7f5146817013ada904a66bba3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:37:42.466221Z","signature_b64":"krhIg2GnAcn+7iHLYaYDZiB7s6LuYIS4QhgHdwKfKOcWKEQ3UEN/YQR8tQELIdaiX2w3kOLnlcvNmh8pU1ygDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ee1971d53e3756f541fdc2276bd8b04e6365fbd7f5146817013ada904a66bba3","last_reissued_at":"2026-05-18T01:37:42.465509Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:37:42.465509Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0805.0783","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:37:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7YUNf1iL7pIBt3CkspvNlG25jecQTw4W+CJ3ji2iKYGFYkObiPIM1pJieJcyZNM3QfurMvuav66liKnyraoXCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T23:58:27.046507Z"},"content_sha256":"ebd061ff82a3ed02d17ea59b844913af9fe008e6ee0d45fc62d130143b0bf7b6","schema_version":"1.0","event_id":"sha256:ebd061ff82a3ed02d17ea59b844913af9fe008e6ee0d45fc62d130143b0bf7b6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:5YMXDVJ6G5LPKQP5YITWXWFQJZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Relational Parametricity and Separation Logic","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.LO","authors_text":"Hongseok Yang, Lars Birkedal","submitted_at":"2008-05-06T19:27:14Z","abstract_excerpt":"Separation logic is a recent extension of Hoare logic for reasoning about programs with references to shared mutable data structures. In this paper, we provide a new interpretation of the logic for a programming language with higher types. Our interpretation is based on Reynolds's relational parametricity, and it provides a formal connection between separation logic and data abstraction."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0805.0783","kind":"arxiv","version":2},"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":"2026-05-18T01:37:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VASkXdMt8Q/heNjinUsV5Ud/PhzthQ+hF+2jZIst7yAnzyBrS2jeok0me1UQyqM0wpwoiCBHk+AHTuP6Xcx+DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T23:58:27.047167Z"},"content_sha256":"acf6a8a1d0fe8e98a68a3c44a802e55b92754f26706ef4c63f666f0e7baae3a8","schema_version":"1.0","event_id":"sha256:acf6a8a1d0fe8e98a68a3c44a802e55b92754f26706ef4c63f666f0e7baae3a8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5YMXDVJ6G5LPKQP5YITWXWFQJZ/bundle.json","state_url":"https://pith.science/pith/5YMXDVJ6G5LPKQP5YITWXWFQJZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5YMXDVJ6G5LPKQP5YITWXWFQJZ/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":"2026-06-07T23:58:27Z","links":{"resolver":"https://pith.science/pith/5YMXDVJ6G5LPKQP5YITWXWFQJZ","bundle":"https://pith.science/pith/5YMXDVJ6G5LPKQP5YITWXWFQJZ/bundle.json","state":"https://pith.science/pith/5YMXDVJ6G5LPKQP5YITWXWFQJZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5YMXDVJ6G5LPKQP5YITWXWFQJZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:5YMXDVJ6G5LPKQP5YITWXWFQJZ","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":"044b8fae7ff66006185a721ef96ed945022406138035547700a9dbf3890154ae","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LO","submitted_at":"2008-05-06T19:27:14Z","title_canon_sha256":"eb36cfee66445766ce8020d84784c0d90abb897b0e3a85a059f4523808ce5394"},"schema_version":"1.0","source":{"id":"0805.0783","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0805.0783","created_at":"2026-05-18T01:37:42Z"},{"alias_kind":"arxiv_version","alias_value":"0805.0783v2","created_at":"2026-05-18T01:37:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0805.0783","created_at":"2026-05-18T01:37:42Z"},{"alias_kind":"pith_short_12","alias_value":"5YMXDVJ6G5LP","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_16","alias_value":"5YMXDVJ6G5LPKQP5","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_8","alias_value":"5YMXDVJ6","created_at":"2026-05-18T12:25:56Z"}],"graph_snapshots":[{"event_id":"sha256:acf6a8a1d0fe8e98a68a3c44a802e55b92754f26706ef4c63f666f0e7baae3a8","target":"graph","created_at":"2026-05-18T01:37:42Z","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":"Separation logic is a recent extension of Hoare logic for reasoning about programs with references to shared mutable data structures. In this paper, we provide a new interpretation of the logic for a programming language with higher types. Our interpretation is based on Reynolds's relational parametricity, and it provides a formal connection between separation logic and data abstraction.","authors_text":"Hongseok Yang, Lars Birkedal","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LO","submitted_at":"2008-05-06T19:27:14Z","title":"Relational Parametricity and Separation Logic"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0805.0783","kind":"arxiv","version":2},"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:ebd061ff82a3ed02d17ea59b844913af9fe008e6ee0d45fc62d130143b0bf7b6","target":"record","created_at":"2026-05-18T01:37:42Z","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":"044b8fae7ff66006185a721ef96ed945022406138035547700a9dbf3890154ae","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LO","submitted_at":"2008-05-06T19:27:14Z","title_canon_sha256":"eb36cfee66445766ce8020d84784c0d90abb897b0e3a85a059f4523808ce5394"},"schema_version":"1.0","source":{"id":"0805.0783","kind":"arxiv","version":2}},"canonical_sha256":"ee1971d53e3756f541fdc2276bd8b04e6365fbd7f5146817013ada904a66bba3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ee1971d53e3756f541fdc2276bd8b04e6365fbd7f5146817013ada904a66bba3","first_computed_at":"2026-05-18T01:37:42.465509Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:37:42.465509Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"krhIg2GnAcn+7iHLYaYDZiB7s6LuYIS4QhgHdwKfKOcWKEQ3UEN/YQR8tQELIdaiX2w3kOLnlcvNmh8pU1ygDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:37:42.466221Z","signed_message":"canonical_sha256_bytes"},"source_id":"0805.0783","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ebd061ff82a3ed02d17ea59b844913af9fe008e6ee0d45fc62d130143b0bf7b6","sha256:acf6a8a1d0fe8e98a68a3c44a802e55b92754f26706ef4c63f666f0e7baae3a8"],"state_sha256":"02475395f1b8c6af1f579b108ba8c157ebd98c27e6c9d5447b921a8ac43f8647"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BctvywXLVGdQF376j/GACfU36+6wnoXf56Gb2FCTl7mCUWZlGSsyI2mN2WotNo864JQ8dRsKP2udnzye3f53DA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T23:58:27.051720Z","bundle_sha256":"5b5e891a561c54d02c0bc14e9e5eb7d944cc3192a31a08808c8dfbfd6de47c1c"}}