{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:6OSW2THQJ2Z46EKGU5LOWRAICT","short_pith_number":"pith:6OSW2THQ","canonical_record":{"source":{"id":"1407.6153","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DC","submitted_at":"2014-07-23T09:47:57Z","cross_cats_sorted":[],"title_canon_sha256":"3e2f66081efd828d7b82e55eda08c93c493955659f9db70f8ea46de43904725c","abstract_canon_sha256":"d4a177cc46a378b55f632854e6d0c327ac76e1b01dd8eacd980ef436c91e14e9"},"schema_version":"1.0"},"canonical_sha256":"f3a56d4cf04eb3cf1146a756eb440814dae3e678f878d1be3cdfaa2e3b8653a9","source":{"kind":"arxiv","id":"1407.6153","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.6153","created_at":"2026-05-18T02:46:58Z"},{"alias_kind":"arxiv_version","alias_value":"1407.6153v1","created_at":"2026-05-18T02:46:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.6153","created_at":"2026-05-18T02:46:58Z"},{"alias_kind":"pith_short_12","alias_value":"6OSW2THQJ2Z4","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_16","alias_value":"6OSW2THQJ2Z46EKG","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_8","alias_value":"6OSW2THQ","created_at":"2026-05-18T12:28:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:6OSW2THQJ2Z46EKGU5LOWRAICT","target":"record","payload":{"canonical_record":{"source":{"id":"1407.6153","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DC","submitted_at":"2014-07-23T09:47:57Z","cross_cats_sorted":[],"title_canon_sha256":"3e2f66081efd828d7b82e55eda08c93c493955659f9db70f8ea46de43904725c","abstract_canon_sha256":"d4a177cc46a378b55f632854e6d0c327ac76e1b01dd8eacd980ef436c91e14e9"},"schema_version":"1.0"},"canonical_sha256":"f3a56d4cf04eb3cf1146a756eb440814dae3e678f878d1be3cdfaa2e3b8653a9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:46:58.849259Z","signature_b64":"7La9AGbwOOcyBwkJjFDQ2sJAMvGOM2qWdExxegdI5eYi5V7mMIREaPPPV2C1TREfxBjtQxy0QjOr1W8UdOFJBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f3a56d4cf04eb3cf1146a756eb440814dae3e678f878d1be3cdfaa2e3b8653a9","last_reissued_at":"2026-05-18T02:46:58.848608Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:46:58.848608Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1407.6153","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":"2026-05-18T02:46:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"B48PeQ+P0AWvrf9olU/9J417dnuMN+l182GnmmIgKKNeiqWjDcj41Gj0SN08IgI8S/6YUSVSuOr7UwUR7ZeyBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T03:26:58.108564Z"},"content_sha256":"ee2741d66ac68e36491288b580b02a7579f628824248ba193af500083b2d285c","schema_version":"1.0","event_id":"sha256:ee2741d66ac68e36491288b580b02a7579f628824248ba193af500083b2d285c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:6OSW2THQJ2Z46EKGU5LOWRAICT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Write-and-f-array: implementation and an application","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.DC","authors_text":"Robert Obryk","submitted_at":"2014-07-23T09:47:57Z","abstract_excerpt":"We introduce a new shared memory object: the write-and-f-array, provide its wait-free implementation and use it to construct an improved wait-free implementation of the fetch-and-add object. The write-and-f-array generalizes single-writer write-and-snapshot object in a similar way that the f-array generalizes the multi-writer snapshot object. More specifically, a write-and-f-array is parameterized by an associative operator $f$ and is conceptually an array with two atomic operations:\n  - write-and-f modifies a single array's element and returns the result of applying $f$ to all the elements,\n "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.6153","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":"2026-05-18T02:46:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qkmnuuoLGI8C/sRvwYacufmlITwv6tybEg5WuVUYOHv77RS6iHARQ7dedasTbi0KBZJQcjSiYe9Yeg3WIYfTBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T03:26:58.109130Z"},"content_sha256":"95ddd4ec6f48b244abe8265a4ded57ae31622f0d6974fe44a6b346266bfd1a35","schema_version":"1.0","event_id":"sha256:95ddd4ec6f48b244abe8265a4ded57ae31622f0d6974fe44a6b346266bfd1a35"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6OSW2THQJ2Z46EKGU5LOWRAICT/bundle.json","state_url":"https://pith.science/pith/6OSW2THQJ2Z46EKGU5LOWRAICT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6OSW2THQJ2Z46EKGU5LOWRAICT/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":"2026-06-01T03:26:58Z","links":{"resolver":"https://pith.science/pith/6OSW2THQJ2Z46EKGU5LOWRAICT","bundle":"https://pith.science/pith/6OSW2THQJ2Z46EKGU5LOWRAICT/bundle.json","state":"https://pith.science/pith/6OSW2THQJ2Z46EKGU5LOWRAICT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6OSW2THQJ2Z46EKGU5LOWRAICT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:6OSW2THQJ2Z46EKGU5LOWRAICT","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":"d4a177cc46a378b55f632854e6d0c327ac76e1b01dd8eacd980ef436c91e14e9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DC","submitted_at":"2014-07-23T09:47:57Z","title_canon_sha256":"3e2f66081efd828d7b82e55eda08c93c493955659f9db70f8ea46de43904725c"},"schema_version":"1.0","source":{"id":"1407.6153","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.6153","created_at":"2026-05-18T02:46:58Z"},{"alias_kind":"arxiv_version","alias_value":"1407.6153v1","created_at":"2026-05-18T02:46:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.6153","created_at":"2026-05-18T02:46:58Z"},{"alias_kind":"pith_short_12","alias_value":"6OSW2THQJ2Z4","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_16","alias_value":"6OSW2THQJ2Z46EKG","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_8","alias_value":"6OSW2THQ","created_at":"2026-05-18T12:28:16Z"}],"graph_snapshots":[{"event_id":"sha256:95ddd4ec6f48b244abe8265a4ded57ae31622f0d6974fe44a6b346266bfd1a35","target":"graph","created_at":"2026-05-18T02:46:58Z","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 new shared memory object: the write-and-f-array, provide its wait-free implementation and use it to construct an improved wait-free implementation of the fetch-and-add object. The write-and-f-array generalizes single-writer write-and-snapshot object in a similar way that the f-array generalizes the multi-writer snapshot object. More specifically, a write-and-f-array is parameterized by an associative operator $f$ and is conceptually an array with two atomic operations:\n  - write-and-f modifies a single array's element and returns the result of applying $f$ to all the elements,\n ","authors_text":"Robert Obryk","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DC","submitted_at":"2014-07-23T09:47:57Z","title":"Write-and-f-array: implementation and an application"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.6153","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:ee2741d66ac68e36491288b580b02a7579f628824248ba193af500083b2d285c","target":"record","created_at":"2026-05-18T02:46:58Z","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":"d4a177cc46a378b55f632854e6d0c327ac76e1b01dd8eacd980ef436c91e14e9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DC","submitted_at":"2014-07-23T09:47:57Z","title_canon_sha256":"3e2f66081efd828d7b82e55eda08c93c493955659f9db70f8ea46de43904725c"},"schema_version":"1.0","source":{"id":"1407.6153","kind":"arxiv","version":1}},"canonical_sha256":"f3a56d4cf04eb3cf1146a756eb440814dae3e678f878d1be3cdfaa2e3b8653a9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f3a56d4cf04eb3cf1146a756eb440814dae3e678f878d1be3cdfaa2e3b8653a9","first_computed_at":"2026-05-18T02:46:58.848608Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:46:58.848608Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7La9AGbwOOcyBwkJjFDQ2sJAMvGOM2qWdExxegdI5eYi5V7mMIREaPPPV2C1TREfxBjtQxy0QjOr1W8UdOFJBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:46:58.849259Z","signed_message":"canonical_sha256_bytes"},"source_id":"1407.6153","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ee2741d66ac68e36491288b580b02a7579f628824248ba193af500083b2d285c","sha256:95ddd4ec6f48b244abe8265a4ded57ae31622f0d6974fe44a6b346266bfd1a35"],"state_sha256":"ca927688fc02e13ecaa774b9c0a175dbf3dfd6430c228ff7f301c70fcf2fd8b4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gZ8NHRO7s/bUclFBAgBYA811VtHzJzzZdWhSQjXEWD03f7LM0M+cGKye0OTfs8T10Zdh/kDWxakdgVuVNsUQAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T03:26:58.111787Z","bundle_sha256":"744241eddb17611eaf2ee4387bf71f8c8d76fc84e50fc193dff15216c5767494"}}