{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:X72G4VW6XFH2C4J2BFVGNVOVSV","short_pith_number":"pith:X72G4VW6","canonical_record":{"source":{"id":"2008.05718","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DC","submitted_at":"2020-08-13T06:41:56Z","cross_cats_sorted":[],"title_canon_sha256":"0b1e650218cc99b093f1682262573bdb3b2caa0e0d1d9d9c6a6a220ceea063a8","abstract_canon_sha256":"8867dc8ad3bfdc0c539128a055c109133e3b0e796f6997302821f45e28648255"},"schema_version":"1.0"},"canonical_sha256":"bff46e56deb94fa1713a096a66d5d59550c1b81e1eb4305292a78d3bbc892385","source":{"kind":"arxiv","id":"2008.05718","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2008.05718","created_at":"2026-07-05T01:26:56Z"},{"alias_kind":"arxiv_version","alias_value":"2008.05718v1","created_at":"2026-07-05T01:26:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2008.05718","created_at":"2026-07-05T01:26:56Z"},{"alias_kind":"pith_short_12","alias_value":"X72G4VW6XFH2","created_at":"2026-07-05T01:26:56Z"},{"alias_kind":"pith_short_16","alias_value":"X72G4VW6XFH2C4J2","created_at":"2026-07-05T01:26:56Z"},{"alias_kind":"pith_short_8","alias_value":"X72G4VW6","created_at":"2026-07-05T01:26:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:X72G4VW6XFH2C4J2BFVGNVOVSV","target":"record","payload":{"canonical_record":{"source":{"id":"2008.05718","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DC","submitted_at":"2020-08-13T06:41:56Z","cross_cats_sorted":[],"title_canon_sha256":"0b1e650218cc99b093f1682262573bdb3b2caa0e0d1d9d9c6a6a220ceea063a8","abstract_canon_sha256":"8867dc8ad3bfdc0c539128a055c109133e3b0e796f6997302821f45e28648255"},"schema_version":"1.0"},"canonical_sha256":"bff46e56deb94fa1713a096a66d5d59550c1b81e1eb4305292a78d3bbc892385","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:26:56.568238Z","signature_b64":"7/Ah4TKfrEE7aWbnNB1KsNT82+uHP+aOu2DsYv0QtNZIeiSVXLJpavdQhz+goBq0bnDczvZVIkk5fn19jniaDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bff46e56deb94fa1713a096a66d5d59550c1b81e1eb4305292a78d3bbc892385","last_reissued_at":"2026-07-05T01:26:56.567813Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:26:56.567813Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2008.05718","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":"2026-07-05T01:26:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EkyHPsJKuI4T6k+BA3pZNHY12kOUUzBKnM0oA79G2OhZ8aYBHLFd8CwWzk7J7ObKW4PTBh+rt85oBz1Qk+sBAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T09:09:39.888575Z"},"content_sha256":"b9f1b6145883033df8fdaccbef26939757727bba4d55b192923d92269ce834e6","schema_version":"1.0","event_id":"sha256:b9f1b6145883033df8fdaccbef26939757727bba4d55b192923d92269ce834e6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:X72G4VW6XFH2C4J2BFVGNVOVSV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Fine-Grained Hybrid CPU-GPU Algorithm for Betweenness Centrality Computations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.DC","authors_text":"Ashirbad Mishra, Keshav Pingali, Rupesh Nasre, Sathish Vadhiyar","submitted_at":"2020-08-13T06:41:56Z","abstract_excerpt":"Betweenness centrality (BC) is an important graph analytical application for large-scale graphs. While there are many efforts for parallelizing betweenness centrality algorithms on multi-core CPUs and many-core GPUs, in this work, we propose a novel fine-grained CPU-GPU hybrid algorithm that partitions a graph into CPU and GPU partitions, and performs BC computations for the graph on both the CPU and GPU resources simultaneously with very small number of CPU-GPU communications. The forward phase in our hybrid BC algorithm leverages the multi-source property inherent in the BC problem. We also "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2008.05718","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2008.05718/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T01:26:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aDqxJT49FwFBuaWpmcxgi2bc+J15kdMS+XlqAYhDeuV+J2GoTW3/MEovn3MW1npPBYxjMnB0gGXZsS6POUICBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T09:09:39.889082Z"},"content_sha256":"1cccd94d49d651463b89c33cbdd0563333d9d20c8a55af3c972ddec658ae4637","schema_version":"1.0","event_id":"sha256:1cccd94d49d651463b89c33cbdd0563333d9d20c8a55af3c972ddec658ae4637"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/X72G4VW6XFH2C4J2BFVGNVOVSV/bundle.json","state_url":"https://pith.science/pith/X72G4VW6XFH2C4J2BFVGNVOVSV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/X72G4VW6XFH2C4J2BFVGNVOVSV/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":"2026-08-06T09:09:39Z","links":{"resolver":"https://pith.science/pith/X72G4VW6XFH2C4J2BFVGNVOVSV","bundle":"https://pith.science/pith/X72G4VW6XFH2C4J2BFVGNVOVSV/bundle.json","state":"https://pith.science/pith/X72G4VW6XFH2C4J2BFVGNVOVSV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/X72G4VW6XFH2C4J2BFVGNVOVSV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:X72G4VW6XFH2C4J2BFVGNVOVSV","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":"8867dc8ad3bfdc0c539128a055c109133e3b0e796f6997302821f45e28648255","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DC","submitted_at":"2020-08-13T06:41:56Z","title_canon_sha256":"0b1e650218cc99b093f1682262573bdb3b2caa0e0d1d9d9c6a6a220ceea063a8"},"schema_version":"1.0","source":{"id":"2008.05718","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2008.05718","created_at":"2026-07-05T01:26:56Z"},{"alias_kind":"arxiv_version","alias_value":"2008.05718v1","created_at":"2026-07-05T01:26:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2008.05718","created_at":"2026-07-05T01:26:56Z"},{"alias_kind":"pith_short_12","alias_value":"X72G4VW6XFH2","created_at":"2026-07-05T01:26:56Z"},{"alias_kind":"pith_short_16","alias_value":"X72G4VW6XFH2C4J2","created_at":"2026-07-05T01:26:56Z"},{"alias_kind":"pith_short_8","alias_value":"X72G4VW6","created_at":"2026-07-05T01:26:56Z"}],"graph_snapshots":[{"event_id":"sha256:1cccd94d49d651463b89c33cbdd0563333d9d20c8a55af3c972ddec658ae4637","target":"graph","created_at":"2026-07-05T01:26:56Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2008.05718/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Betweenness centrality (BC) is an important graph analytical application for large-scale graphs. While there are many efforts for parallelizing betweenness centrality algorithms on multi-core CPUs and many-core GPUs, in this work, we propose a novel fine-grained CPU-GPU hybrid algorithm that partitions a graph into CPU and GPU partitions, and performs BC computations for the graph on both the CPU and GPU resources simultaneously with very small number of CPU-GPU communications. The forward phase in our hybrid BC algorithm leverages the multi-source property inherent in the BC problem. We also ","authors_text":"Ashirbad Mishra, Keshav Pingali, Rupesh Nasre, Sathish Vadhiyar","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DC","submitted_at":"2020-08-13T06:41:56Z","title":"A Fine-Grained Hybrid CPU-GPU Algorithm for Betweenness Centrality Computations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2008.05718","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:b9f1b6145883033df8fdaccbef26939757727bba4d55b192923d92269ce834e6","target":"record","created_at":"2026-07-05T01:26:56Z","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":"8867dc8ad3bfdc0c539128a055c109133e3b0e796f6997302821f45e28648255","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.DC","submitted_at":"2020-08-13T06:41:56Z","title_canon_sha256":"0b1e650218cc99b093f1682262573bdb3b2caa0e0d1d9d9c6a6a220ceea063a8"},"schema_version":"1.0","source":{"id":"2008.05718","kind":"arxiv","version":1}},"canonical_sha256":"bff46e56deb94fa1713a096a66d5d59550c1b81e1eb4305292a78d3bbc892385","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bff46e56deb94fa1713a096a66d5d59550c1b81e1eb4305292a78d3bbc892385","first_computed_at":"2026-07-05T01:26:56.567813Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:26:56.567813Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7/Ah4TKfrEE7aWbnNB1KsNT82+uHP+aOu2DsYv0QtNZIeiSVXLJpavdQhz+goBq0bnDczvZVIkk5fn19jniaDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T01:26:56.568238Z","signed_message":"canonical_sha256_bytes"},"source_id":"2008.05718","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b9f1b6145883033df8fdaccbef26939757727bba4d55b192923d92269ce834e6","sha256:1cccd94d49d651463b89c33cbdd0563333d9d20c8a55af3c972ddec658ae4637"],"state_sha256":"c72d10de8e8d86d93cdbb132f5e3c1f5716fd0f3e6afaabc74d2d6401fa48c21"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qHjBzxX2wRZAHj5Zj4iGDoo06sPTaNEAfjVHUXMY1g0iVevMK+vUXaT6CYneV3QoETDROt7RsWgQssOL5NPjAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T09:09:39.892785Z","bundle_sha256":"12e27a67fc5de9290328237845ed2db259eb146a279151a2f6dad46a15b855e7"}}