{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:RPS7772E5CKYVO2R7PJXOX2IRS","short_pith_number":"pith:RPS7772E","canonical_record":{"source":{"id":"1801.02216","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.PL","submitted_at":"2018-01-07T17:14:47Z","cross_cats_sorted":[],"title_canon_sha256":"7a18d8c5ba7a8a2279e14d0406077474bf87758463ca6a929b38b123efde260e","abstract_canon_sha256":"66f88c29697980ca69785a7f154fdae45146bbb4a9e7b437583c76d534937806"},"schema_version":"1.0"},"canonical_sha256":"8be5ffff44e8958abb51fbd3775f488c8ddab2f2f470afad69264f68dfabf6f8","source":{"kind":"arxiv","id":"1801.02216","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.02216","created_at":"2026-05-18T00:26:34Z"},{"alias_kind":"arxiv_version","alias_value":"1801.02216v1","created_at":"2026-05-18T00:26:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.02216","created_at":"2026-05-18T00:26:34Z"},{"alias_kind":"pith_short_12","alias_value":"RPS7772E5CKY","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"RPS7772E5CKYVO2R","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"RPS7772E","created_at":"2026-05-18T12:32:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:RPS7772E5CKYVO2R7PJXOX2IRS","target":"record","payload":{"canonical_record":{"source":{"id":"1801.02216","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.PL","submitted_at":"2018-01-07T17:14:47Z","cross_cats_sorted":[],"title_canon_sha256":"7a18d8c5ba7a8a2279e14d0406077474bf87758463ca6a929b38b123efde260e","abstract_canon_sha256":"66f88c29697980ca69785a7f154fdae45146bbb4a9e7b437583c76d534937806"},"schema_version":"1.0"},"canonical_sha256":"8be5ffff44e8958abb51fbd3775f488c8ddab2f2f470afad69264f68dfabf6f8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:26:34.538308Z","signature_b64":"ZyJ1e4eb41IwgxlQnOqCfpqKu4JmHbRo024nFOv78z8MXM+kebzaYUNGZFgaRZPK5702Ew4+YauP92A6At5IDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8be5ffff44e8958abb51fbd3775f488c8ddab2f2f470afad69264f68dfabf6f8","last_reissued_at":"2026-05-18T00:26:34.537682Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:26:34.537682Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1801.02216","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":"2026-05-18T00:26:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rNSan0jP8xuYRnY7YlPw86ljDm2rFDUwRKXZKQTZECDIfawK71lINv4774R3zqJxGhIzSEqCrVPBhLzBnuzkCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T22:21:00.247863Z"},"content_sha256":"9910571f1c2880d3477904d4c82009d30ceeefdf94acf378e89886aeccbd3116","schema_version":"1.0","event_id":"sha256:9910571f1c2880d3477904d4c82009d30ceeefdf94acf378e89886aeccbd3116"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:RPS7772E5CKYVO2R7PJXOX2IRS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Arrows for Parallel Computation","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cs.PL","authors_text":"Martin Braun, Oleg Lobachev, Phil Trinder","submitted_at":"2018-01-07T17:14:47Z","abstract_excerpt":"Arrows are a general interface for computation and an alternative to Monads for API design. In contrast to Monad-based parallelism, we explore the use of Arrows for specifying generalised parallelism. Specifically, we define an Arrow-based language and implement it using multiple parallel Haskells.\n  As each parallel computation is an Arrow, such parallel Arrows (PArrows) can be readily composed and transformed as such. To allow for more sophisticated communication schemes between computation nodes in distributed systems, we utilise the concept of Futures to wrap direct communication.\n  To sho"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.02216","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":"2026-05-18T00:26:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7Aap3YV3IloKsGDWsn6pRIIkR9OTQl0Yl/QsEnsrqM7muBkLJDg2Zk+4fLlmYZzbbMTibbG5iWwJFh0kd63nCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T22:21:00.248536Z"},"content_sha256":"190988267d5944c581598e436536779ce13b602674ced262ba23f4a5adeba032","schema_version":"1.0","event_id":"sha256:190988267d5944c581598e436536779ce13b602674ced262ba23f4a5adeba032"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RPS7772E5CKYVO2R7PJXOX2IRS/bundle.json","state_url":"https://pith.science/pith/RPS7772E5CKYVO2R7PJXOX2IRS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RPS7772E5CKYVO2R7PJXOX2IRS/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":"2026-05-22T22:21:00Z","links":{"resolver":"https://pith.science/pith/RPS7772E5CKYVO2R7PJXOX2IRS","bundle":"https://pith.science/pith/RPS7772E5CKYVO2R7PJXOX2IRS/bundle.json","state":"https://pith.science/pith/RPS7772E5CKYVO2R7PJXOX2IRS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RPS7772E5CKYVO2R7PJXOX2IRS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:RPS7772E5CKYVO2R7PJXOX2IRS","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":"66f88c29697980ca69785a7f154fdae45146bbb4a9e7b437583c76d534937806","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.PL","submitted_at":"2018-01-07T17:14:47Z","title_canon_sha256":"7a18d8c5ba7a8a2279e14d0406077474bf87758463ca6a929b38b123efde260e"},"schema_version":"1.0","source":{"id":"1801.02216","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.02216","created_at":"2026-05-18T00:26:34Z"},{"alias_kind":"arxiv_version","alias_value":"1801.02216v1","created_at":"2026-05-18T00:26:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.02216","created_at":"2026-05-18T00:26:34Z"},{"alias_kind":"pith_short_12","alias_value":"RPS7772E5CKY","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"RPS7772E5CKYVO2R","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"RPS7772E","created_at":"2026-05-18T12:32:50Z"}],"graph_snapshots":[{"event_id":"sha256:190988267d5944c581598e436536779ce13b602674ced262ba23f4a5adeba032","target":"graph","created_at":"2026-05-18T00:26:34Z","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":"Arrows are a general interface for computation and an alternative to Monads for API design. In contrast to Monad-based parallelism, we explore the use of Arrows for specifying generalised parallelism. Specifically, we define an Arrow-based language and implement it using multiple parallel Haskells.\n  As each parallel computation is an Arrow, such parallel Arrows (PArrows) can be readily composed and transformed as such. To allow for more sophisticated communication schemes between computation nodes in distributed systems, we utilise the concept of Futures to wrap direct communication.\n  To sho","authors_text":"Martin Braun, Oleg Lobachev, Phil Trinder","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.PL","submitted_at":"2018-01-07T17:14:47Z","title":"Arrows for Parallel Computation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.02216","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":"sha256:9910571f1c2880d3477904d4c82009d30ceeefdf94acf378e89886aeccbd3116","target":"record","created_at":"2026-05-18T00:26:34Z","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":"66f88c29697980ca69785a7f154fdae45146bbb4a9e7b437583c76d534937806","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.PL","submitted_at":"2018-01-07T17:14:47Z","title_canon_sha256":"7a18d8c5ba7a8a2279e14d0406077474bf87758463ca6a929b38b123efde260e"},"schema_version":"1.0","source":{"id":"1801.02216","kind":"arxiv","version":1}},"canonical_sha256":"8be5ffff44e8958abb51fbd3775f488c8ddab2f2f470afad69264f68dfabf6f8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8be5ffff44e8958abb51fbd3775f488c8ddab2f2f470afad69264f68dfabf6f8","first_computed_at":"2026-05-18T00:26:34.537682Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:26:34.537682Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZyJ1e4eb41IwgxlQnOqCfpqKu4JmHbRo024nFOv78z8MXM+kebzaYUNGZFgaRZPK5702Ew4+YauP92A6At5IDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:26:34.538308Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.02216","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9910571f1c2880d3477904d4c82009d30ceeefdf94acf378e89886aeccbd3116","sha256:190988267d5944c581598e436536779ce13b602674ced262ba23f4a5adeba032"],"state_sha256":"d178891461e3883931770378ee1e83ccfa277bb40d22bff9033c571286cdcec7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"s1Lil2gj0kbWHrd0nszT1nunSU4QVOEnZvpCYaLqeeTynd+a04aiHSlAfLfTt1O+Te+ST2aHYaHBEFcTsfpUAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-22T22:21:00.251706Z","bundle_sha256":"2ded8d5bde6e7961b7250d256863e1685575bc2a3c5b0a2e9353f131fa268cfa"}}