{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:Q2SNHGHYFWRQ3CSZMXZDSAYB4G","short_pith_number":"pith:Q2SNHGHY","canonical_record":{"source":{"id":"1803.05838","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2018-03-15T16:16:35Z","cross_cats_sorted":[],"title_canon_sha256":"8725f9578c558850898d6191d6d9e453771535c446d0d6095854eb95ebd4983d","abstract_canon_sha256":"e3e0ad2e4f85dd7d92c0f84503860386da3c575231120e510cbd42aaccfc9395"},"schema_version":"1.0"},"canonical_sha256":"86a4d398f82da30d8a5965f2390301e1b1f91543e870bbb8edb1ba3e32692740","source":{"kind":"arxiv","id":"1803.05838","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.05838","created_at":"2026-05-18T00:09:05Z"},{"alias_kind":"arxiv_version","alias_value":"1803.05838v3","created_at":"2026-05-18T00:09:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.05838","created_at":"2026-05-18T00:09:05Z"},{"alias_kind":"pith_short_12","alias_value":"Q2SNHGHYFWRQ","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_16","alias_value":"Q2SNHGHYFWRQ3CSZ","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_8","alias_value":"Q2SNHGHY","created_at":"2026-05-18T12:32:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:Q2SNHGHYFWRQ3CSZMXZDSAYB4G","target":"record","payload":{"canonical_record":{"source":{"id":"1803.05838","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2018-03-15T16:16:35Z","cross_cats_sorted":[],"title_canon_sha256":"8725f9578c558850898d6191d6d9e453771535c446d0d6095854eb95ebd4983d","abstract_canon_sha256":"e3e0ad2e4f85dd7d92c0f84503860386da3c575231120e510cbd42aaccfc9395"},"schema_version":"1.0"},"canonical_sha256":"86a4d398f82da30d8a5965f2390301e1b1f91543e870bbb8edb1ba3e32692740","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:09:05.556952Z","signature_b64":"JQC6mG728Z+qgsbZCipMsJ0bYaFcSR0dBxw/e5kzEM6eLM8dtqzaJczOGQrZ73nnzBTyIACk++quSFNmVwF4CA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"86a4d398f82da30d8a5965f2390301e1b1f91543e870bbb8edb1ba3e32692740","last_reissued_at":"2026-05-18T00:09:05.556445Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:09:05.556445Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1803.05838","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":"2026-05-18T00:09:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0KalpVNf21IrWxYJIMxeLewZm2rIe05zDoMHgLDEkRAJtg6qMhlCLPc3YwnEX/QVYmbzpaVhBKBRDgWnbbzVAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T06:21:07.313305Z"},"content_sha256":"71443c3566b508483fac83debc802c1bee053efdd411d8b9271f91617ee64ccc","schema_version":"1.0","event_id":"sha256:71443c3566b508483fac83debc802c1bee053efdd411d8b9271f91617ee64ccc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:Q2SNHGHYFWRQ3CSZMXZDSAYB4G","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Tracing sharing in an imperative pure calculus (Extended Version)","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.PL","authors_text":"Elena Zucca, Marco Servetto, Paola Giannini, Tim Richter","submitted_at":"2018-03-15T16:16:35Z","abstract_excerpt":"We introduce a type and effect system, for an imperative object calculus, which infers \"sharing\" possibly introduced by the evaluation of an expression, represented as an equivalence relation among its free variables. This direct representation of sharing effects at the syntactic level allows us to express in a natural way, and to generalize, widely-used notions in literature, notably \"uniqueness\" and \"borrowing\". Moreover, the calculus is \"pure\" in the sense that reduction is defined on language terms only, since they directly encode store. The advantage of this non-standard execution model w"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.05838","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":"2026-05-18T00:09:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"g2vbFI3vtdDQEJcml0I3zsMBI4g68hmSZyqWHAttBIaZcShirbEWC5xINNCwqliy3lFJn2UZCbCfYglCOeFLAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T06:21:07.314033Z"},"content_sha256":"bc5d64c67b5020c7910246d302ea3fc22ff163c5a991015b7be512702c8d7f91","schema_version":"1.0","event_id":"sha256:bc5d64c67b5020c7910246d302ea3fc22ff163c5a991015b7be512702c8d7f91"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Q2SNHGHYFWRQ3CSZMXZDSAYB4G/bundle.json","state_url":"https://pith.science/pith/Q2SNHGHYFWRQ3CSZMXZDSAYB4G/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Q2SNHGHYFWRQ3CSZMXZDSAYB4G/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":"2026-06-08T06:21:07Z","links":{"resolver":"https://pith.science/pith/Q2SNHGHYFWRQ3CSZMXZDSAYB4G","bundle":"https://pith.science/pith/Q2SNHGHYFWRQ3CSZMXZDSAYB4G/bundle.json","state":"https://pith.science/pith/Q2SNHGHYFWRQ3CSZMXZDSAYB4G/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Q2SNHGHYFWRQ3CSZMXZDSAYB4G/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:Q2SNHGHYFWRQ3CSZMXZDSAYB4G","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":"e3e0ad2e4f85dd7d92c0f84503860386da3c575231120e510cbd42aaccfc9395","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2018-03-15T16:16:35Z","title_canon_sha256":"8725f9578c558850898d6191d6d9e453771535c446d0d6095854eb95ebd4983d"},"schema_version":"1.0","source":{"id":"1803.05838","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.05838","created_at":"2026-05-18T00:09:05Z"},{"alias_kind":"arxiv_version","alias_value":"1803.05838v3","created_at":"2026-05-18T00:09:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.05838","created_at":"2026-05-18T00:09:05Z"},{"alias_kind":"pith_short_12","alias_value":"Q2SNHGHYFWRQ","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_16","alias_value":"Q2SNHGHYFWRQ3CSZ","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_8","alias_value":"Q2SNHGHY","created_at":"2026-05-18T12:32:46Z"}],"graph_snapshots":[{"event_id":"sha256:bc5d64c67b5020c7910246d302ea3fc22ff163c5a991015b7be512702c8d7f91","target":"graph","created_at":"2026-05-18T00:09:05Z","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 a type and effect system, for an imperative object calculus, which infers \"sharing\" possibly introduced by the evaluation of an expression, represented as an equivalence relation among its free variables. This direct representation of sharing effects at the syntactic level allows us to express in a natural way, and to generalize, widely-used notions in literature, notably \"uniqueness\" and \"borrowing\". Moreover, the calculus is \"pure\" in the sense that reduction is defined on language terms only, since they directly encode store. The advantage of this non-standard execution model w","authors_text":"Elena Zucca, Marco Servetto, Paola Giannini, Tim Richter","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2018-03-15T16:16:35Z","title":"Tracing sharing in an imperative pure calculus (Extended Version)"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.05838","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":"sha256:71443c3566b508483fac83debc802c1bee053efdd411d8b9271f91617ee64ccc","target":"record","created_at":"2026-05-18T00:09:05Z","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":"e3e0ad2e4f85dd7d92c0f84503860386da3c575231120e510cbd42aaccfc9395","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.PL","submitted_at":"2018-03-15T16:16:35Z","title_canon_sha256":"8725f9578c558850898d6191d6d9e453771535c446d0d6095854eb95ebd4983d"},"schema_version":"1.0","source":{"id":"1803.05838","kind":"arxiv","version":3}},"canonical_sha256":"86a4d398f82da30d8a5965f2390301e1b1f91543e870bbb8edb1ba3e32692740","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"86a4d398f82da30d8a5965f2390301e1b1f91543e870bbb8edb1ba3e32692740","first_computed_at":"2026-05-18T00:09:05.556445Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:09:05.556445Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JQC6mG728Z+qgsbZCipMsJ0bYaFcSR0dBxw/e5kzEM6eLM8dtqzaJczOGQrZ73nnzBTyIACk++quSFNmVwF4CA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:09:05.556952Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.05838","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:71443c3566b508483fac83debc802c1bee053efdd411d8b9271f91617ee64ccc","sha256:bc5d64c67b5020c7910246d302ea3fc22ff163c5a991015b7be512702c8d7f91"],"state_sha256":"87d9ce5bbd0c8ef83753fed0c6b40dc21953838f5ae8686250d7fcfadd0e2b0c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Mfa9YdEO9lCe+0gnTTDOnc3EbgliLIvLv125hC70/dSkGBIEDjXgvnBHNLKSZfU5O/lXkC1d7kHBo4hyh6ZyAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T06:21:07.318481Z","bundle_sha256":"6cd1ad5a43c0c1943cff58edbc5c877ed38b938b07f2906f6966537b3b02854e"}}