{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:EQIJK7EOUYPL7KFAKWCRTYZXPA","short_pith_number":"pith:EQIJK7EO","canonical_record":{"source":{"id":"1408.1605","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DC","submitted_at":"2014-08-07T14:34:15Z","cross_cats_sorted":[],"title_canon_sha256":"ce48351f2c9e780ffdda3a3e76e1b2450c0fe49c22e8201a141ce413916d8788","abstract_canon_sha256":"4a8f7e8319cfefc660e1e3059b61ab3c652ebc6f8620aaa57b4ed05dd516e918"},"schema_version":"1.0"},"canonical_sha256":"2410957c8ea61ebfa8a0558519e337781214c6d77141f98b4638d575eec506de","source":{"kind":"arxiv","id":"1408.1605","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1408.1605","created_at":"2026-05-18T02:30:40Z"},{"alias_kind":"arxiv_version","alias_value":"1408.1605v2","created_at":"2026-05-18T02:30:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1408.1605","created_at":"2026-05-18T02:30:40Z"},{"alias_kind":"pith_short_12","alias_value":"EQIJK7EOUYPL","created_at":"2026-05-18T12:28:28Z"},{"alias_kind":"pith_short_16","alias_value":"EQIJK7EOUYPL7KFA","created_at":"2026-05-18T12:28:28Z"},{"alias_kind":"pith_short_8","alias_value":"EQIJK7EO","created_at":"2026-05-18T12:28:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:EQIJK7EOUYPL7KFAKWCRTYZXPA","target":"record","payload":{"canonical_record":{"source":{"id":"1408.1605","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DC","submitted_at":"2014-08-07T14:34:15Z","cross_cats_sorted":[],"title_canon_sha256":"ce48351f2c9e780ffdda3a3e76e1b2450c0fe49c22e8201a141ce413916d8788","abstract_canon_sha256":"4a8f7e8319cfefc660e1e3059b61ab3c652ebc6f8620aaa57b4ed05dd516e918"},"schema_version":"1.0"},"canonical_sha256":"2410957c8ea61ebfa8a0558519e337781214c6d77141f98b4638d575eec506de","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:30:40.021274Z","signature_b64":"A5o4dsnTJtjoliQvc1X5agTJ/a0njhHfrFXPEVC4GDbuVvphe6EoH17KYYu8xESOIQc2vDM/hz2PjX3EGwf1Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2410957c8ea61ebfa8a0558519e337781214c6d77141f98b4638d575eec506de","last_reissued_at":"2026-05-18T02:30:40.020867Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:30:40.020867Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1408.1605","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":"2026-05-18T02:30:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oTw1l5VpUNdcHeSZQOTTlvq7TJ1CmtOa/VS7ZT5Hk/eMweE/EUn3dlqZeXKAH8CGl/p5LFUisi0gGqybMpJuDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T05:02:39.065185Z"},"content_sha256":"cc61c6241e1c979449d8142271d02b801104685ad42860e68d525758b29da314","schema_version":"1.0","event_id":"sha256:cc61c6241e1c979449d8142271d02b801104685ad42860e68d525758b29da314"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:EQIJK7EOUYPL7KFAKWCRTYZXPA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Parallel Distributed Breadth First Search on the Kepler Architecture","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.DC","authors_text":"Enrico Mastrostefano, Massimo Bernaschi, Mauro Bisson","submitted_at":"2014-08-07T14:34:15Z","abstract_excerpt":"We present the results obtained by using an evolution of our CUDA-based solution for the exploration, via a Breadth First Search, of large graphs. This latest version exploits at its best the features of the Kepler architecture and relies on a combination of techniques to reduce both the number of communications among the GPUs and the amount of exchanged data. The final result is a code that can visit more than 800 billion edges in a second by using a cluster equipped with 4096 Tesla K20X GPUs."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1408.1605","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":"2026-05-18T02:30:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8z7ObCCa1m3ANIlR9rzsd+qsfyZHyMeRyYStKc5BnFh+y4osaNEyBaJylMpFFBnd2M1MOQ2yAQ3iN9LkoI26Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T05:02:39.065548Z"},"content_sha256":"9175d3b25fc0820c8cde04e42745720846d7fccbc0f6d3d8a1ed6455eeb5bfe3","schema_version":"1.0","event_id":"sha256:9175d3b25fc0820c8cde04e42745720846d7fccbc0f6d3d8a1ed6455eeb5bfe3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EQIJK7EOUYPL7KFAKWCRTYZXPA/bundle.json","state_url":"https://pith.science/pith/EQIJK7EOUYPL7KFAKWCRTYZXPA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EQIJK7EOUYPL7KFAKWCRTYZXPA/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":"2026-05-28T05:02:39Z","links":{"resolver":"https://pith.science/pith/EQIJK7EOUYPL7KFAKWCRTYZXPA","bundle":"https://pith.science/pith/EQIJK7EOUYPL7KFAKWCRTYZXPA/bundle.json","state":"https://pith.science/pith/EQIJK7EOUYPL7KFAKWCRTYZXPA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EQIJK7EOUYPL7KFAKWCRTYZXPA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:EQIJK7EOUYPL7KFAKWCRTYZXPA","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":"4a8f7e8319cfefc660e1e3059b61ab3c652ebc6f8620aaa57b4ed05dd516e918","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DC","submitted_at":"2014-08-07T14:34:15Z","title_canon_sha256":"ce48351f2c9e780ffdda3a3e76e1b2450c0fe49c22e8201a141ce413916d8788"},"schema_version":"1.0","source":{"id":"1408.1605","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1408.1605","created_at":"2026-05-18T02:30:40Z"},{"alias_kind":"arxiv_version","alias_value":"1408.1605v2","created_at":"2026-05-18T02:30:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1408.1605","created_at":"2026-05-18T02:30:40Z"},{"alias_kind":"pith_short_12","alias_value":"EQIJK7EOUYPL","created_at":"2026-05-18T12:28:28Z"},{"alias_kind":"pith_short_16","alias_value":"EQIJK7EOUYPL7KFA","created_at":"2026-05-18T12:28:28Z"},{"alias_kind":"pith_short_8","alias_value":"EQIJK7EO","created_at":"2026-05-18T12:28:28Z"}],"graph_snapshots":[{"event_id":"sha256:9175d3b25fc0820c8cde04e42745720846d7fccbc0f6d3d8a1ed6455eeb5bfe3","target":"graph","created_at":"2026-05-18T02:30:40Z","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 present the results obtained by using an evolution of our CUDA-based solution for the exploration, via a Breadth First Search, of large graphs. This latest version exploits at its best the features of the Kepler architecture and relies on a combination of techniques to reduce both the number of communications among the GPUs and the amount of exchanged data. The final result is a code that can visit more than 800 billion edges in a second by using a cluster equipped with 4096 Tesla K20X GPUs.","authors_text":"Enrico Mastrostefano, Massimo Bernaschi, Mauro Bisson","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DC","submitted_at":"2014-08-07T14:34:15Z","title":"Parallel Distributed Breadth First Search on the Kepler Architecture"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1408.1605","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:cc61c6241e1c979449d8142271d02b801104685ad42860e68d525758b29da314","target":"record","created_at":"2026-05-18T02:30:40Z","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":"4a8f7e8319cfefc660e1e3059b61ab3c652ebc6f8620aaa57b4ed05dd516e918","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DC","submitted_at":"2014-08-07T14:34:15Z","title_canon_sha256":"ce48351f2c9e780ffdda3a3e76e1b2450c0fe49c22e8201a141ce413916d8788"},"schema_version":"1.0","source":{"id":"1408.1605","kind":"arxiv","version":2}},"canonical_sha256":"2410957c8ea61ebfa8a0558519e337781214c6d77141f98b4638d575eec506de","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2410957c8ea61ebfa8a0558519e337781214c6d77141f98b4638d575eec506de","first_computed_at":"2026-05-18T02:30:40.020867Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:30:40.020867Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"A5o4dsnTJtjoliQvc1X5agTJ/a0njhHfrFXPEVC4GDbuVvphe6EoH17KYYu8xESOIQc2vDM/hz2PjX3EGwf1Ag==","signature_status":"signed_v1","signed_at":"2026-05-18T02:30:40.021274Z","signed_message":"canonical_sha256_bytes"},"source_id":"1408.1605","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cc61c6241e1c979449d8142271d02b801104685ad42860e68d525758b29da314","sha256:9175d3b25fc0820c8cde04e42745720846d7fccbc0f6d3d8a1ed6455eeb5bfe3"],"state_sha256":"5c09773fc4f8051516c5e7ecf5b2686763ff3c207c2798d40b3dab38660b17f1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"o65IlY7JylNsn25MKfMlYjVYFQNYHJeJAbZs8vl3zr5d+Ugir38/XGkf3ktrg1OflAar5tmFef6ursXI9G+iCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T05:02:39.067570Z","bundle_sha256":"9e5da4e1f95fc0bde69f39d570ca1c842433729adb44a74d35814a6e125e0ee1"}}